defective vs impaired

defective

• Having one or more defects. 

• Not capable of representing all the phonemic distinctions of a language it is used to write. 

• 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. 

• Lacking some forms; e.g., having only one tense or being usable only in the third person. 

• Having a root whose final consonant is weak (ي, و, or ء). 

• A word written without matres lectionis (letters indicating vowels). 

• A person or thing considered to be defective. 

• Without matres lectionis (letters indicating vowels) written out. 

impaired

• Rendered less effective. 

• inebriated, drunk. 

• A criminal charge for driving a vehicle while impaired.