It would serve us all well to know how porously open we all are to models of behavior far beyond the color line.
late 14c., "full of pores," from Old French poros (14c., Modern French poreux), from Medieval Latin porosus; or directly from Latin porus "an opening" (see pore (n.)). Figurative use from 1640s.
porous po·rous (pôr'əs)adj.
Full of or having pores.
Admitting the passage of gas or liquid through pores.