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"gaze intently," early 13c., of unknown origin, with no obvious corresponding word in Old French. Perhaps from Old English *purian, suggested by spyrian "to investigate, examine," and spor "a trace, vestige." Related: Pored; poring.
"minute opening," late 14c., from Old French pore (14c.) and directly from Latin porus "a pore," from Greek poros "a pore," literally "passage, way," from PIE *por- "going, passage," from root *per- "to lead, pass over" (see port (n.1)).
A minute opening in an animal or plant tissue.
One of the minute openings of the sweat glands of the skin.