- Have an effect upon;
- Press or wedge together; pack together
- Influencing strongly; "they resented the impingement of American values on European culture"
- The violent interaction of individuals or groups entering into combat; "the armies met in the shock of battle"
- The striking of one body against another
- A forceful consequence; a strong effect; "the book had an important impact on my thinking"; "the book packs a wallop"