adverb, noun which may take the genitive case particle 'no'
originally; from the start; by nature
Describes the original state or inherent nature of something. Often used when contrasting the past with the present, or when emphasizing that something has always been a certain way.
彼はもともと優しい人だ。
He is a kind person by nature.
この町はもともと小さな村だった。
This town was originally a small village.
na-adjective, noun
none the worse; even; same as before
Used in conditional expressions like 〜てももともと or 〜でもともと to mean that even if something happens, the situation will be no worse than before, or the outcome will be the same. Often implies a sense of acceptance or low risk.
失敗してももともとだ。
Even if I fail, I'll be no worse off than before.
だめでもともとだから、やってみよう。
There's nothing to lose, so let's give it a try.