Cases of word usage

1) a prisoner's solemn promise that he or she will not repeat a crime (parole)

2) any of many kinds of bird with a short, hooked bill and (often) brightly coloured feathers, of which some kinds can repeat human speech (parrot)

3) to repeat the main points of (something that has been said, discussed, argued about etc) (recapitulate)

4) to say (something), speak, with a tendency to repeat the same sound or syllable, as in 'G-g-give me that b-b-book' (stammer)