zadušíti to suffocate, to stifle, to choke, to throttle, to smother
zadušíti upor to stifle (ali to smother) a rebellion
zadušíti se to get suffocated (ali stifled, choked, smothered)
zadušíti se v delu (figurativno) to be overwhelmed with work
skoraj zadušil se je od smeha he nearly choked with laughter