noun, na-adjective
emotional instability
Describes a state where emotions are easily disturbed or unpredictable. Often used in psychological or everyday contexts to refer to mood swings or a lack of emotional balance.
最近、彼は情緒不安定で、ちょっとしたことで怒ったり泣いたりする。
Lately he's been emotionally unstable, getting angry or crying over little things.
During adolescence, one is prone to emotional instability.