こころえ心得kokoroeるru
1.
To grasp the intricacies and nuances of a subject, indicating a comprehensive understanding based on experience and reflection.
2.
To acknowledge and accept a situation with full awareness, often implying responsibility or readiness to act accordingly.
3.
To have an established familiarity with a practice or field, such that one is capable of engaging with it effectively and intuitively.
Example:
彼女は夫の心理を心得ている。