One of two verbs for “fill” in The Etymologies of the 1930s appearing in its (Noldorin) infinitive form pathro under the root ᴹ√KWAT (Ety/KWAT). I think this verb may be intransitive given related pathred “fullness”. If pathra- were transitive I would expected pathred to be “✱✱filling”.
Conceptual Development: The Gnomish Lexicon of the 1910s had G. {cwinta- >>} cwintha- “to fill” (GL/28), clearly based on the early root ᴱ√QṆTṆ and cognate to ᴱQ. qanta- “fill, complete” (QL/78).
One of two (Noldorin) verbs for “fill” in The Etymologies of the 1930s appearing in its present or infinitive form pannod under the root ᴹ√KWAT (Ety/KWAT). This verb is sometimes interpreted as an a-verb panna-, but I think it is more likely to be a half-strong verb pannad(a)-. I think it may also be transitive, as opposed to intransitive pathra-.