He worked without pay for the first six months.
He works as an unpaid intern.
会社は無給休暇を認めた。
The company approved unpaid leave.
I took three days of unpaid leave.
The company's finances worsened and the employees went unpaid.
salaried; paid; with pay · paid vacation; paid leave
無給 means 'unpaid, without wages', the direct opposite of 給's sense of receiving pay.
無休 (same reading as 無給) means 'no days off, open every day', not 'unpaid' as 無給 does.
unpaid doctor
Compound of 無 (mu, 'without') and 給 (kyū, 'salary' or 'pay'). The reading is on'yomi, and the word is a straightforward Sino-Japanese formation.