Etymology
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entrench (v.)

also intrench, 1550s, implied in intrenched, from en- (1) "make, put in" + trench (n.). Figurative use is from 1590s. Related: Entrenched; entrenching.

updated on September 02, 2014

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Definitions of entrench from WordNet

entrench (v.)
fix firmly or securely;
Synonyms: intrench
entrench (v.)
occupy a trench or secured area;
Synonyms: dig in
entrench (v.)
impinge or infringe upon;
This matter entrenches on other domains
Synonyms: impinge / encroach / trench
Etymologies are not definitions. From wordnet.princeton.edu, not affiliated with etymonline.