癖
くせ · kuse · JLPT N3 · noun
habit
🚬 癖 = 疒 sickness + 辟: a habit is a chronic little ailment you keep
The 疒 radical marks illness, as in 病 (sickness). A 癖 is a quirk that clings like a lingering condition. Common phrase: 口癖 (kuchiguse), a verbal tic or pet phrase, literally a mouth habit.