a note that alternates rapidly with another note a semitone above it
the articulation of a consonant (especially the consonant `r') with a rapid flutter of the tongue against the palate or uvula; "he pronounced his R's with a distinct trill"
pronounce with a trill, of the phoneme `r'; "Some speakers trill their r's"
impose a penalty on; inflict punishment on; "The students were penalized for showing up late for class"; "we had to punish the dog for soiling the floor again"