Frostbound
You've locked a foe in frost. Their strike timer stops dead until they thaw, so the swing they were winding up sits there unspent.
In detail
A stun on a single enemy, laid by Frost proc charms such as Frozen Tear. It stops that enemy's strike timer for about 5 seconds, the single-target version of a Frost Vial. Enraged enemies ignore it. Bosses, echoes and mini-bosses resist debuffs at about 60% effectiveness, so a 5-second stun becomes about 3 seconds on them.
More in glossary
From the current development build. Content and balance may change before release. This public reference includes discoveries and does not reflect your personal unlocks.