be̍h-chûn襪船

short boat-shaped socks not higher

short boat-shaped socks not higher than the heels (used in winter to keep warm)

English Wiktionary, “襪船” (CC BY-SA 4.0) — https://en.wiktionary.org/wiki/%E8%A5%AA%E8%88%B9 · confidence: Medium (Wiktionary)