pre-noun adjectival
what kind of; what sort of; what
Pre-noun adjectival (rentaishi) used to ask or describe the nature or type of something. Formal/literary equivalent of どんな.
No matter what the reason, violence is not acceptable.
彼がいかなる人物かは誰も知らない。
Nobody knows what kind of person he is.
pre-noun adjectival
Used in constructions like いかなる...でも/も to mean 'no matter what kind of...' or 'any...'. Emphatic and formal.
いかなる困難にも負けずに前進する。
We will advance without giving in to any difficulties.
いかなる場合でも、この規則は守らなければならない。
In any case, this rule must be observed.
No matter what happens, I will not give up.
Everyone is equal before the law, no matter who they are.
I want you to think carefully about what kind of meaning this holds.