Etymology
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seep (v.)

"ooze or percolate gently through pores," 1790, a variant of sipe (c. 1500), which is perhaps ultimately from Old English sipian "to seep," from Proto-Germanic *sip- (source also of Middle High German sifen, Dutch sijpelen "to ooze"), from PIE root *seib- "to pour out, drip, trickle" (see soap (n.)). Related: Seeped; seeping.

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Definitions of seep

seep (v.)
pass gradually or leak through or as if through small openings;
Synonyms: ooze
From wordnet.princeton.edu