"encroachment" in the noun sense
1. invasion, encroachment, intrusion
any entry into an area not previously occupied
"an invasion of tourists"
"an invasion of locusts"
2. trespass, encroachment, violation, intrusion, usurpation
entry to another's property without right or permission
3. impingement, encroachment, impact
influencing strongly
"they resented the impingement of American values on European culture"
Source: WordNet® (An amazing lexical database of English)
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