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.
She's a hard worker, so I'm sure she'll succeed.
Our team has a lot of people who persevere.
頑張り屋 is someone who perseveres and keeps trying hard, the opposite of a 三日坊主 who gives up almost immediately.
Standard kanji spelling.
Variant with や in kana; less common but still encountered.
Compound of 頑張り (continuative form of 頑張る, 'to persevere') and 屋 (suffix for a person with a certain trait).