• 侵入しんにゅう — invasion / trespass
• 侵害しんがい — violation / infringement
• 侵略しんりゃく — aggression / invasion
• 侵食しんしょく — erosion / encroachment
• 侵犯しんぱん — violation / intrusion

The radical 亻 (person) indicates human action. The right part provides sound and nuance of entering forcefully. Together they suggest a person intruding into another’s territory — leading to meanings of invasion, violation, and encroachment.

国境こっきょうを 侵おかすのは 違法いほうです。
It is illegal to violate a national border.

著作権ちょさくけんの侵害しんがいが 問題もんだいになっている。
Copyright infringement is becoming a problem.