小ちいさFreq.FrequencyTop 20,000Meanings1nounbaby; infantarchaicArchaic noun for a baby or infant. Not used in modern Japanese; the modern word is 赤ちゃん (あかちゃん) or 赤ん坊 (あかんぼう).古こ語ごでは「ちいさ」は幼おさな子ごを指さした。In old language, 'chiisa' referred to a young child.