de·com·press 
(dē′kəm-prĕs)
(dē′kəm-prĕs)v. de·com·pressed, de·com·press·ing, de·com·press·es
v.tr.
1. To relieve of pressure or compression.
2. To bring (a person exposed to conditions of increased pressure) gradually back to normal atmospheric pressure.
v.intr.
1. To adjust to normal atmospheric conditions after being exposed to increased pressure.
2. Informal To relax: decompressed after 12 hours of driving.