Many women with pain have difficulties with penetration as well.
The scenes of penetration are obscured with masking or blurring.
Cost of batteries is the largest barrier to penetration of plug-in vehicles.
c.1600, "insight, shrewdness," from Latin penetrationem (nominative penetratio) "a penetrating or piercing," noun of action from past participle stem of penetrare (see penetrate). The sexual sense is attested from 1610s.