Synonyms of 'encroach'
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If you say that someone is intruding into a particular place or situation, you mean that they are not wanted or welcome there.
He kept intruding with personal questions.
Thesaurus for encroach from the Collins English Thesaurus
If one thing encroaches on another, the first thing spreads or becomes stronger , and slowly begins to restrict the power , range , or effectiveness of the second thing.