Auxiliary verb, Godan verb with 'ru' ending (irregular verb)
it is assuredly (that) ...; can say with confidence that it is ...
see なのだ
いくつになっても子供は子供なのである。No matter the age, a child is a child.
Auxiliary verb, Godan verb with 'ru' ending (irregular verb)
it is assuredly (that) ...; can say with confidence that it is ...
see なのだ