iak-iông抑揚

to rise and fall

to rise and fall; to modulate (of sound); modulation; intonation; cadence

English Wiktionary, “抑揚” (CC BY-SA 4.0) — https://en.wiktionary.org/wiki/%E6%8A%91%E6%8F%9A · confidence: Medium (Wiktionary, Hokkien)