1. Synonyms for Airlessness include fug, heaviness, mugginess, oppressiveness, staleness, stuffiness, sultriness, closeness, dampness and humidity

2. 21 These deep colours have an oppressiveness which is neither cloying nor mournful but richly potent.

3. Late 15c., "an increasing in gravity or seriousness," from French aggravation, from Late Latin Aggravationem(nominative aggravatio), noun of action from past-participle stem of Latin aggravare"make heavier," figuratively "to embarrass further, increase in oppressiveness," from ad"to" (see ad-) + gravare"weigh down," from gravis"heavy" (from PIE root *gwere-(1) "heavy").

4. Late 15c., "an increasing in gravity or seriousness," from French aggravation, from Late Latin Aggravationem (nominative aggravatio), noun of action from past-participle stem of Latin aggravare "make heavier," figuratively "to embarrass further, increase in oppressiveness," from ad "to" (see ad-) + gravare "weigh down," from gravis "heavy" (from PIE root *gwere- (1) "heavy").