弛缓

弛缓	chí huǎn	to relax / to slacken / relaxation (in nuclear magnetic resonance)
弛	chí	to unstring a bow / to slacken / to relax / to loosen
缓	huǎn	slow / unhurried / sluggish / gradual / not tense / relaxed / to postpone / to defer / to stall / to stave off / to revive / to recuperate