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entrench (v.)
[entrench 词源字典]
also
intrench
, 1550s, implied in
intrenched
, from
en-
(1) "make, put in" +
trench
(n.). Figurative use is from 1590s. Related:
Entrenched
;
entrenching
.
[entrench etymology, entrench origin, 英语词源]