意い馬ば

noun

uncontrolled mind; wild thoughts

Rare literary noun, almost exclusively found in the idiom 意馬心猿 (いばしんえん), meaning 'uncontrollable passions and wandering thoughts'. Not used in modern conversation.

• 「意い馬ば心しん猿えん」は、心こころが乱みだれて落おち着つかないことを表あらわす四よ字じ熟じゅく語ごです。

  The four-character idiom 意馬心猿 describes a state where the mind is restless and unsettled.