Noun(Particle)さえ
Usage
さえ is an emphatic particle. In non-conditional clauses it means "even". When さえ is used, the particle が never occurs, を usually does not occur, へ and the directional に are optional, and the other particles including the locational に、で、と and から，are mandatory. Even
Examples
忙しいすぎて、寝る時間さえありません。
Because I am busy I don't event have time to sleep.
トムさんは日本食が大好きだそうだ。納豆さえ食べるらしい。
It seems like Tom loves Japanese food. He even eats Natto.