This is the 11947th most frequent Russian word.
заткнуть
"Заткнуть" means "to plug, cover, or shut (something) up."
The word 'заткнуть' is used here in the context of plugging or stopping up something.
Он попросил её заткнуть кран умывальника.
He asked her to plug the sink faucet.
The word 'заткнуть' is used here metaphorically, meaning to force someone to stop talking.
Не надо мне заткнуть рот, я хочу высказывать своё мнение.
Don't try to shut me up, I want to express my opinion.
The word 'заткнуть' is used here in the context of inserting or stuffing something into a fit.