chắc

Adjective

 * 1)  firm; secure; steady
 * 2)  sure; certain; positive

Adverb

 * 1)  firmly; securely
 * 2)  surely; certainly; for sure
 * 3)  probably; maybe
 * 1)  probably; maybe
 * 1)  probably; maybe

Usage notes

 * As a particle, chắc carries a harsher tone than the nearly synonymous.

Etymology 2
Cognate with 🇨🇬 cak ("each other").

Adverb

 * 1)  each other, one another