sank vs. sunk

sank

verb

  1. a simple past tense of sink.

sunk

verb

  1. a simple past tense and past participle of sink.

adjective

  1. Informal. beyond help; done for; washed up:

    If they catch you cheating, you're really sunk.

  2. Nautical. (of a forecastle or poop) raised less than a full deck above the weather deck of a ship.