• attenuative, balmy, bland, depressant, mitigative, soothing
• to appease, to assuage, to becalm, to calm, to mollify, to quell, to quieten, to salve, to smooth, to stroke down, to tranquillize
• setting, settling, tranquillization
• to take the stuffing out of sy
• damper, vibration damper
• analgesic, analgetic, painkiller
• to pour oil on troubled waters