trill

nouns

a note that alternates rapidly with another note a semitone above it
shake, trill
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"
trill
is a type of (narrower)
the aspect of pronunciation that involves bringing articulatory organs together so as to shape the sounds of speech
articulation

verbs

pronounce with a trill, of the phoneme `r'
"Some speakers trill their r's"
trill
is a type of (narrower)
speak, pronounce, or utter in a certain way
"She pronounces French words in a funny way"; "I cannot say `zip wire'"; "Can the child sound out this complicated word?"
articulate, enounce, enunciate, pronounce, say, sound out
sing or play with trills, alternating with the half note above or below
quaver, trill, warble