悪魔の3歳 あくまのさんさい Also written 悪魔の三歳 Meanings Expression, Noun terrifying threes; terrible threes; threenager phase (literally: devilish threes) See also: 魔の2歳 (まのにさい). Kanji 悪 bad. Read as アク. 魔 demon 歳 age. Read as サイ. Words containing 悪魔の3歳 悪魔の3歳児 (あくまのさんさいじ) threenager Jinuma: Japanese Dictionary · Word lists