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passionately 
1 amorously, ardently, desirously, erotically, hot-bloodedly, libidinously, lovingly, lustfully, sensually, sexily  (informal) steamily  (informal) with passion 
2 animatedly, ardently, eagerly, emotionally, enthusiastically, excitedly, fervently, fervidly, fiercely, frenziedly, impetuously, impulsively, intensely, strongly, vehemently, warmly, wildly, with all one's heart, zealously 
3 excitably, fierily, hot-headedly, irascibly, stormily, tempestuously, violently 
 
Antonyms  
 
1 coldly, frigidly, unlovingly, unresponsively 
2 apathetically, calmly, coldly, half-heartedly, indifferently, nonchalantly, unemotionally, unenthusiastically 
3 calmly, placidly, unexcitably