What it means
いかなる is a formal attributive expression meaning “any kind of” or “no matter what.” It modifies a noun and presents the noun as unrestricted by type, condition, or circumstance. It is especially common in written, formal, and argumentative language, where it can give a statement an emphatic or principled tone.
Usage note
いかなる is considerably more formal than どんな and is not normally used as a casual standalone substitute. It must directly modify a noun, as in いかなる困難, although the entire noun phrase may participate in larger patterns such as いかなる困難にも or いかなる理由であれ.
How to use it
この計画はいかなる困難にも屈しません。
This plan will not yield to any difficulty.
この計画はいかなる困難にも屈しない。
This plan will not yield to any difficulty.
Example sentences
いかなる理由であれ、研究データの改ざんは許されない。
Whatever the reason, falsifying research data is unacceptable.
いかなる状況においても、避難経路をふさがないでください。
Under no circumstances should you block the evacuation route.
いかなる批判にも耳を傾ける姿勢が、指導者には求められる。
Leaders are required to have an attitude of listening to any kind of criticism.
いかなる