1) Blasted a hole in 2) Brought to ruin 3) Descended 4) Descended gradually 5) Descended underwater 6) Destroyed a destroyer 7) Destroyed destroyers 8) Dipped 9) Dropped 10) Dropped in the drink 11) Dropped like an anchor 12) Dropped sharply 13) Emulated the Titanic 14) Fell 15) Fell prey to quicksand Found on https://www.crosswordclues.com/clue/sank