English definition of “sink”
/sɪŋk/ verb (past tense and past participle sank, also US sunk, past participle sunk)
WATER [I, T] › to go down or make something go down below the surface of water and not come back up: The Titanic sank after hitting an iceberg. During the first wave of attacks, they sank three enemy ships.
SOFT SUBSTANCE [I, T] › to go down, or make something go down, into something soft: My feet keep sinking into the sand. It sank its teeth into his arm.
MOVE DOWN [I] › to move down slowly: The sun sank below the horizon.