Early Quenya
qapa-
verb. to chaffer, bargain, swap, barter
Beware, older languages below! The languages below were invented during Tolkien's earlier period and should be used with caution. Remember to never, ever mix words from different languages!
qapa-
verb. to chaffer, bargain, swap, barter
A verb appearing as ᴱQ. qapa- “chaffer, bargain, swap, barter” in the Qenya Lexicon under the early root ᴱ√QAPA “chaffer” [= haggle] (QL/76).
Neo-Quenya: I would retain ᴺQ. quap- “chaffer, bargain, swap, barter” for purposes of Neo-Quenya derived from a Neo-Root ᴺS. √KWAP, since we otherwise have very few words having to do with commerce.