love for one's parents; devotion to one's parents
Describes a person who deeply cares for their parents, often used to praise filial piety.
彼女は親思いで、毎週実家に帰っている。
She is devoted to her parents and goes back to her family home every week.
What a loving son you have.
Compound of 親 (oya, 'parent') and 思い (omoi, 'thought, feeling, love'). The derivation is straightforward; the word has been used since at least the Edo period.