Sent to the ocean floor

• Descended gradually
• Went to the ocean's bottom
• Dropped like an anchor
• Scuttled
• "Sighted sub, ___ same": Mason
• Fell, as feelings
• Pocketed, as a billiard ball
• What the Lusitania did
• Went to the bottom of the ocean

Wiktionary Word definitions in Wiktionary
vb. (en-simple past of: sink )