The katakana syllable チャ (cha). Its equivalent in hiragana is ちゃ (cha).

Alternative form of エッチ (etchi, “dirty; lewd; perverted; sexual”)

Alternative form of エッチ (etchi, “sexual intercourse”)

Alternative form of エッチ (etchi, “to fuck; to have sex with”)

he / distal demonstrative, something far off removed from both speaker and listener: that / boyfriend

distal demonstrative, something far off removed from both speaker and listener: that, yon / particularly, male personal third person pronoun: he / by extension from he: boyfriend

he; boyfriend

(mahjong) the opponent on the player's left; player on the left

習慣付ける: make a habit of, get in the habit of

You'll be convinced if you listen to me.