breadwinner; earner; hard worker
Refers to the person who earns the income that supports a family or household. Can also describe someone who works hard to earn money.
He is the breadwinner of the family.
彼女は優秀な稼ぎ手で、家族を支えている。
She is an excellent earner and supports her family.
Compound of 稼ぎ (かせぎ, 'earning') + 手 (て, 'person'). The 手 suffix indicates a person who performs the action.