noun
hard worker; person who perseveres
Describes someone who consistently puts in effort and doesn't give up easily. Often used with admiration or mild teasing.
彼女は頑張り屋だから、きっと成功するよ。
She's a hard worker, so I'm sure she'll succeed.
うちのチームには頑張り屋が多い。
Our team has a lot of people who persevere.
努力家 emphasizes diligent effort and studiousness, while 頑張り屋 highlights persistence and a never-give-up attitude.
Compound of 頑張り (continuative form of 頑張る, 'to persevere') and 屋 (suffix for a person with a certain trait).