tuia-

verb. to sprout, spring

tuia-

verb. to swell

tuia-

verb. to sprout, spring; to swell

A verb appearing in its [Noldorin] infinitive form tuio in The Etymologies of the 1930s under the root ᴹ√TUY “spring, sprout”, the cognate of ᴹQ. tuia “sprouts, springs” (Ety/TUY). Under the root ᴹ√TIW “fat, thick”, Tolkien said the verb tuio meant “to swell” and was cognate to ᴹQ. tiuya- (Ety/TIW). I suspect it was the result of a blending of these two roots and meanings: “sprout, spring” when applied to plants and “swell” otherwise.

Conceptual Development: The Gnomish Lexicon of the 1910s had the similarly-derived G. tuitha- “sprout, spring, gush”, likely based on the early root ᴱ√TUẎU (GL/71; QL/96).

Cognates

• ᴹQ. tiuya- “to swell, grow fat” ✧ Ety/TIW
• ᴹQ. tuia- “to sprout, spring” ✧ Ety/TUY

Derivations

• On. tuio- “to swell” ✧ Ety/TIW
  • ᴹ√TIW “fat, thick” ✧ Ety/TIW
• ᴹ√TUY “sprout, spring” ✧ Ety/TUY

Phonetic Developments

Development	Stages	Sources
On. tuio- > tuio	[tuia-]	✧ Ety/TIW

tui

noun. a sprout, bud

tuiw

noun. a sprout, bud