gia̍k-ní逆耳

to grate on the ear

to grate on the ear; to be unpleasant to the ear

English Wiktionary, “逆耳” (CC BY-SA 4.0) — https://en.wiktionary.org/wiki/%E9%80%86%E8%80%B3 · confidence: Medium (Wiktionary, Hokkien)