defective

中文： 有缺陷的、有毛病的、不完全变化的

1. Having one or more defects. · If the workmanship is defective, they'll replace the shoes with a new pair.· Artillery officers sometimes have defective hearing.
2. Lacking some forms; e.g., having only one tense or being usable only in the third person.
3. Having a root whose final consonant is weak (ي, و, or ء).
4. Not capable of representing all the phonemic distinctions of a language it is used to write.
5. Spelled without matres lectionis, for example אמץ (ómets, “courage”) as opposed to the plene spelling אומץ where the letter vav ⟨ו⟩ indicates the vowel o.