(1)使(金屬)回火(harden，strengthen (a material，esp a metal) by heating;alternate heating and cooling)[T+n]：～ed steel 回火鋼;a new process for～ing steel 煉鋼的新流程;
(2)使緩和，軟化，調合(soften or make less severe)[T+n，T+n+prep (with)]：～justice with mercy 情法兼顧;Mother tried to～Father's anger with soothing words. 母親盡力用安慰的話使父親消氣。 He tried to～his refusal with a smile. 他盡力用微笑使自己的拒絕顯得溫和些。The heat of the summer here is～ed by pleasant wind. 愜意的風緩和了這里夏季的酷熱?！纪絪often，weaken