kvetch

[English words of Yiddish origin] to complain habitually, gripe; as a noun, a person who always complains (from Yiddish קװעטשן kvetshn 'press, squeeze', cf. German quetschen 'squeeze')
Found on http://en.wikipedia.org/wiki/List_of_English_words_of_Yiddish_origin

kvetch

noun (Yiddish) a nagging complaint
Found on https://www.encyclo.co.uk/local/20974

kvetch

express complaints, discontent, displeasure, or unhappiness
Found on https://www.vocabulary.com/lists/526658

Kvetch

Kvetch is slang for to complain, whine.
Found on http://www.probertencyclopaedia.com/browse/ZK.HTM
No exact match found