adverb
eagerly; diligently; wholeheartedly
Conveys working on something with focused effort and strong will. Often used in formal or business contexts to describe earnest endeavor.
社員一同、鋭意努力しております。
All of our employees are making diligent efforts.
問題解決に向けて鋭意取り組んでいます
We are working earnestly toward solving the problem.
Compound of 鋭 (ei, 'sharp, keen') and 意 (i, 'mind, thought'), suggesting a sharp, focused mind applied to a task. The exact historical derivation is uncertain, but the spelling is conventionally associated with earnest effort.