implicit (adj.)

1590s, "implied, resting on inference," from French implicite and directly from Latin implicitus, later variant of implicatus "entangled, confused, involved," past participle of implicare "entangle, involve," from assimilated form of in- "into, in, on, upon" (from PIE root *en "in") + plicare "to fold" (from PIE root *plek- "to plait"). From c. 1600 as "resulting from perfect confidence (in authority), unquestioning" (especially of faith).

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Definitions of implicit from WordNet

implicit (adj.)
implied though not directly expressed; inherent in the nature of something;
an implicit agreement not to raise the subject
there was implicit criticism in his voice
anger was implicit in the argument
the oak is implicit in the acorn
Synonyms: inexplicit
implicit (adj.)
being without doubt or reserve;
implicit trust
Synonyms: unquestioning