Basic Guidelines For English Spellings
READ THESE ARTICLES
1To compress again; especially to increase the pressure of (air or other gas); to increase the gas pressure in (a vessel or chamber) again.
2To increase again the pressure of air or other gas acting on (a person or animal); specifically to subject (a diver or pilot) to increased pressure following a spell of decompression; to subject to recompression.
Mid 17th century; earliest use found in Walter Charleton (1620–1707), physician and natural philosopher. From re- + compress.