A complaint or grievance

शिकायत या grievances

English Usage: "His kvetch about the long meeting was heard by everyone in the room."

Hindi Usage: "लगातार शिकायत करना उसकी आदत बन गई थी।"

To complain persistently

निरंतर शिकायत करना

English Usage: "She loves to kvetch about her job every Friday."

Hindi Usage: "वह हर शुक्रवार अपनी नौकरी के बारे में निरंतर शिकायत करती है।"