Focus on the pronunciation of sink
English definition of “sink”
/sɪŋk/ v [I/T] (past tense sank /sæŋk/ or sunk /sʌŋk/, past participle sunk /sʌŋk/) (GO BELOW WATER)
› to move below the surface of water: [I] The boat filled with water and began to sink. [T] It isn’t clear exactly what sank the ship.