もっとも

In a sentence

• 彼は最も優れた選手です。

  He is the best player.

  In this sentence, '最も' is used as an adverb to indicate the superlative degree, meaning 'the most' or 'the best.'

• その提案はもっともだと思います。

  I think that suggestion is reasonable.

  Here, 'もっとも' functions as an adjective meaning 'reasonable' or 'justified,' often used to express agreement.

• もっとも、彼女はそれを知らなかったのかもしれない。

  However, she might not have known about that.

  In this case, 'もっとも' is used as a conjunction meaning 'however' or 'but,' introducing a contrasting explanation.