A (probably transitive) verb for “to fill” derived from the root √KWAT of the same meaning, perhaps based more directly on the adjective quanta “full” (PE17/68). See also the basic verb quat- “fill”.
Conceptual Development: The Qenya Lexicon of the 1910s had ᴱQ. qanta- “fill, complete” under the early root ᴱ√QṆTṆ (QL/78), with perhaps “complete” = “✱fulfill”.
A verb for “refill”, a combination of en- “re-” and quanta- “fill” (PE17/68, 167), appearing most notably in the Namárië poem in the phrase sí man i yulma nin __enquantuva__? “who now shall refill the cup for me?” (LotR/0377).