imperfect

Adjective

• wanting in moral strength, courage, or will; having the attributes of man as opposed to e.g. divine beings
  • I'm only a fallible human
    
  • frail humanity
    

• not perfect; defective or inadequate
  • had only an imperfect understanding of his responsibilities
    
  • imperfect mortals
    
  • drainage here is imperfect
    

Noun

• a tense of verbs used in describing action that is on-going

Related words

• Synonyms: 
  fallible , frail , weak , progressive , progressive tense , imperfect tense , continuous tense