callar
/kaˈʝaɾ/ · A2 · verb
to be silent, to shut up
🤐 callar sounds like collar: a tight collar on the throat stops the talking
From Vulgar Latin callare, to lower (originally to lower a sail, from Greek khalan, to slacken). Lowering the voice all the way down became falling silent. Cállate = shut up, literally lower yourself.