Pore

Part of speech: noun (n.)

1. One of the minute orifices in an animal or vegetable membrane, for transpiration, absorption, etc.

2. A minute opening or passageway; an interstice between the constituent particles or molecules of a body; as, the pores of stones.

Part of speech: verb (v.)

To look or gaze steadily in reading or studying; to fix the attention; to be absorbed; -- often with on or upon, and now usually with over."Painfully to pore upon a book." Shak. The eye grows weary with poring perpetually on the same thing. Dryden.