This is the 3722nd most frequent Japanese word.
くせ
A habit, tendency, or peculiarity (often with a negative connotation).
Here, 'くせ' refers to a 'habit,' often undesirable, acquired over time.
彼は悪いくせがついている。
He has a bad habit.
In this sentence, '癖' ('くせ') denotes an unconscious habitual action, affecting individual behavior.
彼女は話すとき癖で髪を触る。
She touches her hair when she speaks, as a habit.
Here, 'くせ' refers to 'habits' or 'tendencies,' emphasizing personality development or behavioral patterns.