1. 撞击：作者认为,沟槽的形成是髋臼外上缘与半脱位的股骨头顶部长期撞击(impingement)和压迫所致. 骺核碎裂现象也归因于髋臼对股骨头的压应力. 而且,作者还从临床观察到,股骨头一旦出现骺核碎裂及股骨头骺明显受压变扁平,则预后往往不佳,
2. 冲击：impingement corrosion 冲击腐蚀 | impingement 冲击 | impingement 撞击
3. 碰撞：impermeablestratum不透水层 | impingement碰撞 | impinging碰撞
4. 侵犯：impinge 撞击 | impingement 侵犯 | impious 不尊敬的
1. The case is now bound to call into question the whole system of Congressional inquiries and their impingement on individual rights.
noun
1. a sharp collision produced by striking or dashing against something
Synonym: impaction
2. influencing strongly
e.g. they resented the impingement of American values on European culture
Synonym: encroachment impact