noun, na-adjective
aggressive; bold and proactive; resolute
Describes a person or action that is actively and boldly taking initiative, often with a positive connotation of determination. Used in formal or written contexts.
彼は積極果敢に新しいプロジェクトに取り組んだ。
He tackled the new project with bold initiative.
積極果敢な姿勢が評価された。
His proactive and resolute attitude was praised.
Compound of 積極 (せっきょく, 'positive, proactive') and 果敢 (かかん, 'bold, resolute'). The exact historical derivation is uncertain, but the word is a modern Sino-Japanese compound.