long-cherished desire; one's heart's desire
A somewhat literary or formal term for a deeply held wish or ambition, often one that has been nurtured for a long time.
He continued his efforts for many years to fulfill his long-cherished desire.
fulfillment of one's long-cherished wish; realization of a great ambition
The exact derivation is uncertain; the kanji 本 (origin, true) and 懐 (bosom, heart) suggest a 'true heart's desire'.