いぜん (依然) => still, as yet, as it has been N3
Invariant
…のも無理 (は) ない => It's natural for... N3
Evaluate
のも無理もない => (to be) natural,(to be) understandable N3
Evaluate
[可能系「かのうけい」] => Can, be able to, be possible to N4
Can, Should, Must