To impregnate or saturate thoroughly, especially to treat wood or paper with synthetic resin under pressure.
From 'com-' (together/thoroughly) + 'pregnate' (saturate), created in the 20th century to describe the manufacturing process for compreg and similar materials.
Compregnate shows how English constantly creates new verbs for new technologies—when synthetic resins were invented, English speakers needed a word to describe the saturation process, and they built it from Latin roots!
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