de·pres·sur·ize [ dee préshə rz ](past and past participlede·pres·sur·ized, present participlede·pres·sur·iz·ing, 3rd person present singularde·pres·sur·iz·es)
transitive verb
Definition:
1. reduce pressure: to reduce the pressure of air or gas within a container, cabin, or other enclosed space
2. make less tense: to make a situation less tense