Definition of volatile for English Language Learners. : 1  likely to change in a very sudden or extreme way. : 2  having or showing extreme or sudden changes of emotion. : 3  likely to become dangerous or out of control.
expletive (comparative more expletive, superlative most expletive) 1  Serving to fill up, merely for effect, otherwise redundant. 2  Marked by expletives (phrase-fillers).
verb (used with object), exacerbated, exacerbating. 1. to increase the severity, bitterness, or violence of (disease, ill feeling, etc.); aggravate. 2. to embitter the feelings of (a person); irritate; exasperate. Origin of exacerbate. Latin.