noun, noun or participle which takes 'suru', intransitive verb
Rare noun and suru-verb meaning the act of pursuing or carrying out something. In modern Japanese, 追及 (ついきゅう) or 遂行 (すいこう) are far more common for these meanings.
古い文献では「計画の追行」という表現が見られる。
In old documents, the expression 'pursuit of a plan' can be found.
任務の追行には時間がかかった。
Carrying out the mission took time.