adverb
unfortunately; regrettably; to one's regret
Adverbial use expressing that something is regrettable or cannot be helped. Often used at the beginning of a sentence or clause.
いかんせん、時間が足りなかった。
Unfortunately, there wasn't enough time.
いかんせん、予算が限られている。
Regrettably, the budget is limited.
expression
what can be done about ...; ... cannot be helped
Formal or literary expression used in the pattern 〜をいかんせん, meaning that something is beyond one's control or cannot be helped. Rare in everyday speech.
資金不足をいかんせん、計画は中止せざるを得なかった。
With the lack of funds being what it was, we had no choice but to cancel the plan.