unfit
unfit a. (1)不合格的；不能胜任的 指不适合从事某项工作。就父母与子女的关系而言，该术语通常要引入道德懈怠的含义，但这并不是必须的，除了道德缺陷外，任何原因的不适合都会导致父母不适于承担监护之责。 (2)不合格的；不适用的 指商品或服务不适于特定的用途。
UNFIT
unfit
unfit, adj. 1. Unsuitable; not adapted or qualified for a particular use or service (the buyer returned the unfit goods to the seller and asked for a refund). [Cases: Contracts 312(5); Sales 284(1). C.J.S. Contracts § 562; Sales§§ 251, 253, 257.] 2. Family law. Morally unqualified; incompetent (the judge found the mother unfit and so