pore

The word 'pore' traces a direct lineage from the ancient Greek concept of a passage. The Greek poros signified a ford, a way through, or a channel, a meaning rooted in the Proto-Indo-European base per-, meaning "to lead, pass over." This was borrowed into Latin as porus, retaining the sense of an interstice or passage. Adopted into English via Old French in the late 13th century, the term specialized to describe the tiny passages in skin or other materials, perfectly capturing the original logic of a microscopic "way through" a surface for fluids or gases. The verb sense, "to gaze intently," developed in the early 14th century from the metaphorical idea of "passing through" something with one's eyes or mind.

This word is a simplex form. It entered English as a single, unanalyzable unit from Old French, which in turn derived it from Latin porus and ultimately from Greek poros, meaning "passage, way, pore."