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Definition of Painstakingly
1. Adverb. In a fastidious and painstaking manner. "It is almost a waste of time painstakingly to learn the routines of selling" 
Definition of Painstakingly
1. [adv]
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1. Adverb. In a fastidious and painstaking manner. "It is almost a waste of time painstakingly to learn the routines of selling" 
1. [adv]