a.[Z]

1. 未付的；（債等）未還的；未繳納的
   There is an unpaid bill on my table.

   我桌上有張未付的帳單。

2. 無報酬的
   Anne is his unpaid secretary.

   安妮是他的不支薪的祕書。

adj.

1. (of a debt) not yet paid.
2. not receiving or rewarded by payment.