fish; generic term for aquatic cold-blooded vertebrates with gills and fins

To sink or submerge in water

wild goose; any of several species of migratory waterfowl similar to a swan or goose

(bound form) having disappeared without a trace; used in expressions like 杳无音信 yǎo​wú​yīn​xìn to describe a complete lack of news or disappearance