| verb | fall or descend to a lower place or level “He sank to his knees” |
| verb | cause to sink “The Japanese sank American ships in Pearl Harbor” |
| verb | pass into a specified state or condition “He sank into nirvana” |
| verb | go under, “The raft sank and its occupants drowned” |
| verb | descend into or as if into some soft substance or place “He sank into bed” |
| verb | appear to move downward “The sun dipped below the horizon” |
| verb | fall heavily or suddenly; decline markedly “The real estate market fell off” |
| verb | fall or sink heavily “He slumped onto the couch” |
| verb | embed deeply “She sank her fingers into the soft sand” |
| adjective | doomed to extinction |
| drop | noun | a curtain that can be lowered and raised onto a stage from the flies; often used as background scenery |
| passage | noun | the act of passing from one state or place to the next |
| sinker | noun | a weight that sinks (as to hold nets or fishing lines under water) |
| sinking | noun | a descent as through liquid (especially through water) |
| slump | noun | a long-term economic state characterized by unemployment and low prices and low levels of trade and investment |
| falloff | noun | a noticeable deterioration in performance or quality |