Primitive elvish
kwap
root. chaffer, *haggle, bargain
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!
Early Primitive Elvish
kwap-
verb. kwap-
kwapya-
verb. kwapya-
qapa
root. chaffer
A root in the Qenya Lexicon of the 1910s glossed “chaffer”, which is an archaic word for “haggle”; it has a number of derivatives having to do barter and bargaining like ᴱQ. qampo “pedlar, huckster”, ᴱQ. qapta “deal, bargain”, and ᴱQ. qapta- “to exchange” (QL/76). These early words have no clear replacements in Tolkien’s later writing, so I recommend positing a Neo-Eldarin root ᴺ√KWAP to salvage these early words.