弟
おとうと · otouto · JLPT N5 · noun
brother
👦 otouto: oh, toe-toe — little brother always underfoot at your toes
Sound-alike: o-tou-to is close to oh-toe-toe. The younger brother is the small one tagging along at your toes. Etymology: from oto-hito, the younger person, contracted to otouto; 弟 also reads tei/dai in compounds like 兄弟 (kyoudai, brothers).