物心 ものごころ ぶっしん awareness of things around one; ability to understand what is going on around oneself; judgment; judgement; discretion n matter and mind n Advanced ➥
腐心 ふしん taking great pains (to do); making every effort; having a lot of trouble (doing); racking one's brains n vs Advanced ➥
不動心 ふどうしん imperturbability; steadfastness n cool head in an emergency; keeping one's calm (e.g. during a fight) n MA Advanced ➥