ui
    
      
  
              noun.
        envelope
  
    
  
  
  
                
  
        
      ui
    
      
  
              adverb.
        ever
  
    
  
  
  
                
  
        
      ui
    
      
  
              noun.
        envelope (especially of the Outer Sea or Air enfolding the world within the Ilurambar or world-walls)
  
    
  
  
  
                
  
        
      uinen
    
      
  
              feminine name.
        Uinen
  
    
  
  
  
                
  
        
      uiar
    
      
  
              masculine name.
        Ulmo
  
    
  
  
  
                
  
        
      uil
    
      
  
              noun.
        seaweed
  
    
  
  
  
                
  
        
      uidavnen
    
      
  
              adjective.
        ever-closed
  
    
  
  
  
                
  
        
      ui-
    
      
  
              prefix.
        twi-
  
    
  
  
  
                
  
        
      uial
    
      
  
              noun.
        twilight
  
    
  
  
  
                
  
        
      uilos
    
      
  
              place name.
        Everlasting Snow
  
    
  
  
  
                
  
        
      uilw
    
      
  
              noun.
        embers
  
    
  
  
  
                
  
        
      uir
    
      
  
              noun.
        eternity
  
    
  
  
  
                
  
        
      uial
    
      
  
              noun.
        twilight
  
    
  
  
  
                
  
        
      uil
    
      
  
              noun.
        seaweed
  
    
  
  
  
                
  
        
      uir
    
      
  
              noun.
        eternity
  
    
  
  
  
                
  
        
      uireb
    
      
  
              adjective.
        eternal
  
    
  
  
  
                
  
        
      uireb
    
      
  
              adjective.
        eternal
  
    
  
  
  
                
  
        
      oeruil
    
      
  
              noun.
        seaweed
  
    
  
  
  
                
  
        
      guilos
    
      
  
              place name.
        ever-snow
  
    
  
  
  
                
  
        
      guir
    
      
  
              noun.
        eternity
  
    
  
  
  
                
  
        
      guireb
    
      
  
              adjective.
        eternal
  
    
  
  
  
                
  
        
      oeruil
    
      
  
              noun.
        seaweed
  
    
  
  
  
                
  
        
      lhorn
    
      
  
              noun.
        quiet water
  
    
  
  
  
                
  
        
      eil-
    
      
  
              verb.
        to rain
  
    
  
  
  
                
  
        
      iûl
    
      
  
              noun.
        embers
  
    
  
  
  
                
  
        
      o
    
      
  
              preposition.
        from, of (preposition (as a proclitic) used in either direction, from or to the point of view of the speaker)
  
    
  
  
  
                
  
        
      davnan
    
      
  
              adjective.
        ?closed
  
    
  
  
  
                
  
        
      forn(en)
    
      
  
              adjective.
        closed
  
    
  
  
  
                
  
        
      i
    
      
  
              article.
        the
  
    
  
  
  
                
  
        
      nen
    
      
  
              noun.
        water
  
    
  
  
  
                
  
        
      a(n)
    
      
  
              preposition.
        of
  
    
  
  
  
                
  
        
      al-
    
      
  
              prefix.
        no, not
  
    
  
  
  
                
  
        
      anaur
    
      
  
              noun.
        Sun
  
    
  
  
  
                
  
        
      anor
    
      
  
              noun.
        Sun
  
    
  
  
  
                
  
        
      balan
    
      
  
              noun.
        Vala, divine power, divinity
  
    
  
  
  
                
  
        
      bellas
    
      
  
              noun.
        bodily strength
  
    
  
  
  
                
  
        
      bess
    
      
  
              noun.
        (young) woman
  
    
  
  
  
                
  
        
      bess
    
      
  
              noun.
        wife
  
    
  
  
  
                
  
        
      brassen
    
      
  
              adjective.
        white-hot
  
    
  
  
  
                
  
        
      dess
    
      
  
              noun.
        young woman
  
    
  
  
  
                
  
        
      dî
    
      
  
              noun.
        woman, lady
  
    
  
  
  
                
  
        
      fein
    
      
  
              noun/adjective.
        white
  
    
  
  
  
                
  
        
      fein
    
      
  
              noun/adjective.
        cloud
  
    
  
  
  
                
  
        
      heron
    
      
  
              noun.
        master
  
    
  
  
  
                
  
        
      hîr
    
      
  
              noun.
        master, lord
  
    
  
  
  
                
  
        
      i
    
      
  
              definite article.
        the
  
    
  
  
  
                
  
        
      i
    
      
  
              definite article.
        who
  
    
  
  
  
                
  
        
      iell
    
      
  
              noun.
        daughter
  
    
  
  
  
                
  
        
      iell
    
      
  
              noun.
        girl, maid
  
    
  
  
  
                
  
        
      iell
    
      
  
              noun.
        daughter
  
    
  
  
  
                
  
        
      iûl
    
      
  
              noun.
        embers
  
    
  
  
  
                
  
        
      lhorn
    
      
  
              noun.
        anchorage,  harbour
  
    
  
  
  
                
  
        
      mel-
    
      
  
              verb.
        to love
  
    
  
  
  
                
  
        
      meleth
    
      
  
              noun.
        love
  
    
  
  
  
                
  
        
      meleth
    
      
  
              noun.
        love
  
    
  
  
  
                
  
        
      mîl
    
      
  
              noun.
        love, affection
  
    
  
  
  
                
  
        
      mû
    
      
  
              interjection.
        no
  
    
  
  
  
                
  
        
      nan
    
      
  
              preposition.
        of
  
    
  
  
  
                
  
        
      nen
    
      
  
              noun.
        water (used of a lake, pool or lesser river)
  
    
  
  
  
                
  
        
      nen
    
      
  
              noun.
        waterland
  
    
  
  
  
                
  
        
      núron
    
      
  
              masculine name.
        Ulmo
  
    
  
  
  
                
  
        
      nûr
    
      
  
              adjective.
        deep
  
    
  
  
  
                
  
        
      nûr
    
      
  
              adjective.
        deep
  
    
  
  
  
                
  
        
      o
    
      
  
              preposition.
        from, of
  
    
  
  
  
                
  
        
      orthor-
    
      
  
              verb.
        to master, conquer
  
    
  
  
  
                
  
        
      penedh
    
      
  
              noun.
        Elf
  
    
  
  
  
                
  
        
      penn
    
      
  
              noun.
        Elf
  
    
  
  
  
                
  
        
      sell
    
      
  
              noun.
        daughter
  
    
  
  
  
                
  
        
      sell
    
      
  
              noun.
        girl, maid (child)
  
    
  
  
  
                
  
        
      tad
    
      
  
              cardinal.
        two
  
    
  
  
  
                
  
        
      tâd
    
      
  
              cardinal.
        two
  
    
  
  
  
                
  
        
      tâd
    
      
  
              cardinal.
        two
  
    
  
  
  
                
  
        
      tû
    
      
  
              noun.
        muscle, sinew, vigour, physical strength
  
    
  
  
  
                
  
        
      tûr
    
      
  
              noun.
        mastery, victory
  
    
  
  
  
            
 
A noun appearing as N. ui “envelope” in The Etymologies of the 1930s derived from ON. uia < wōia [wǭia] < ᴹ✶wāyā under the root ᴹ√WAY of similar meaning (Ety/WAY). It was used “especially of the Outer Sea or Air enfolding the world within the Ilurambar or world-walls”. In Noldorin of the 1930s, it seems the normal development of ancient āy was ui, with the initial w vanishing before u: wāyā > wǭia > uia > ui.
Neo-Sindarin: In Sindarin of the 1950s and 60s it seems ancient āy became oe, as with goe < ✶gāyā (PM/363). As such the initial w- from ✶wāya would survive to become gw-. Indeed, Tolkien had ancient ✱wāya become gwoe in notes from around 1957 attempting to derive an etymology for gwae “wind” (PE17/34). As such, I would adapt this Noldorin word as ᴺS. gwoe “envelope” for purposes of Neo-Sindarin. I would use it in the more general sense of “a thing enveloping something else”, and not just limited to envelopes used for letters.