(おっと)

おっと
noun
husband
1. husband
A neutral term for husband. This is the most straightforward word for referring to one's spouse without the hierarchical implications of 主人(しゅじん).
My husband is at work now.
I went shopping with my husband.
My husband likes reading books.
My husband plays with the children on his days off.
I met my husband when we were students. It's been twenty years now.

(おっと) is a neutral term for 'husband' and is increasingly preferred by modern Japanese speakers who find 主人(しゅじん) too formal or hierarchical. It's commonly used in official documents and neutral speech. The female equivalent is (つま). In casual conversation, many people also use 旦那(だんな) (danna) for husband.