An onomatopoeia for high, short, yelping or yapping sounds (often from small dogs); can also figuratively describe shrill, noisy cries.
小型犬が通りでキャンキャンと鳴いていた。
A small dog was yapping on the street.
近所の犬が夜中にキャンキャンうるさくて眠れなかった。
The neighborhood dog yelped loudly at night and I couldn't sleep.
子どもが転んでキャンキャン泣き出した。
The child fell and began to cry loudly (yelping).