tǒng-tǎng動蕩

to undulate

to undulate; to ripple; turbulent; full of upheavals; tumultuous; unstable

English Wiktionary, “動蕩” (CC BY-SA 4.0) — https://en.wiktionary.org/wiki/%E5%8B%95%E8%95%A9 · confidence: Medium (Wiktionary, Hokkien)