@@@ appearing as both costë and costië in NQNT; the latter is technically the gerund “quarrelling”
Quenya
costa-
quarrel
costë
noun. quarrel, dispute; legal action
Cognates
- N. cost “quarrel, quarrel, *dispute”
Derivations
- √KOT “hate; be wroth, quarrel, be wroth, quarrel, [ᴹ√]strive; [√] hate”
costa- ("k")vb. "quarrel" (KOT > KOTH)