in one's bones

Prepositional phrase

idiomatic

(idiomatic) (of a feeling, belief, etc.) Derived from instinct, intuition, or an ingrained inclination.

Japanese Meaning

直感的に、本能的に感じること、または内在する深い感覚や信念に基づく状態を表す表現。 / 身体の芯まで感じるほどの、本能や直感に由来する感受性を示す表現。 / 心の奥底や体全体で直感的に捉えるという意味合いを持つ表現。

When facing a risky choice, in one's bones one often knows which path to take.

リスクの高い選択に直面したとき、心の奥底ではどの道を選ぶべきかが分かることが多い。

Sense（1）

(idiomatic) (of a feeling, belief, etc.) Derived from instinct, intuition, or an ingrained inclination.

He understood in his bones that the odds were not in his favor.