yennyEtymologyFrom yen + -y (diminutive suffix), probably influenced by penny.yenny means one yen (unit of Japanese currency); a coin worth one yen. Lexicurio rates it Distinctive — a strength score of 68 out of 100.nounOne yen (unit of Japanese currency); a coin worth one yen.“Went down to see the friendly gas peopl^([sic]) the other day. After I made it clear that I wasn't really in the mood to pay 650,000 little yennies for an oven, they relented and gave me the general lowdown on the kind of oven I need to get.”