penetrate (v.)

1520s, "to pierce into or through," from Latin penetratus, past participle of penetrare "to put or get into, enter into," which is related to penitus "within, inmost," penus "innermost part of a temple, store of food," penates "household gods." The figurative senses of "enter and affect deeply, influence, impress" and "gain intellectual or spiritual access" are from 1580s. Related: Penetrated; penetrating.

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