Related Clues:

• Recessed
• Steeped (in)
• 'You ___ my battleship!'
• Bankrupted
• Traditional location of one of this puzzle's theme words
• Descended gradually
• In the basement
• Submerged theologian admits foreign article is on Kildare
• Destroyed a destroyer
• Not on deck, maybe
• Sent to the ocean floor
• Fell to the bottom
• Pocketed, as a pool ball
• Went down at the start of the week and weekend
• Registered, with "in"