Quenya 

-stë

you

-stë "you", 2nd person dual pronominal ending (VT49:51, 53), e.g. caristë "the two of you do" (VT49:16). Tolkien first wrote carindë, but changed the ending (VT49:33). The ending -stë is derived from earlier -dde (VT49:46, 51). An archaic ending of similar form could also be the third person dual, "the two of them" (but see -ttë #1).