hastily[adverb]Synonyms:- speedily, promptly, quickly, rapidly
- hurriedly, impetuously, precipitately, rashly 
Antonyms: deliberately
Contrasted words: carefully, designedly, studiedly, thoughtfully, gradually, leisurely, slowly, sluggishly
Related Words: agilely, 
nimbly, 
impetuously, 
impulsively, 
unpremeditatedly, 
carelessly, 
recklessly, 
thoughtlessly, 
precipitately, 
prematurely, 
suddenly [TahlilGaran] English Synonym Dictionary ▲
 hast·i·ly /ˈheɪstəli, ˈheɪstɪli/ 
 adverb written quickly, perhaps too quickly
 Synonym : hurriedly: 
 a hastily arranged news conference
 a hastily arranged news conference ‘Don’t worry,’ Jenny added hastily. ‘I checked with Lizzie first.’
 ‘Don’t worry,’ Jenny added hastily. ‘I checked with Lizzie first.’  [TahlilGaran] Dictionary of Contemporary English ▲