gióng-íng仰泳

backstroke

backstroke (a swimming stroke swum on one's back); to swim on one's back

English Wiktionary, “仰泳” (CC BY-SA 4.0) — https://en.wiktionary.org/wiki/%E4%BB%B0%E6%B3%B3 · confidence: Medium (Wiktionary, Hokkien)