feign

Verb

• make a pretence of
  • She assumed indifference, even though she was seething with anger
    
  • he feigned sleep
    

• make believe with the intent to deceive
  • He feigned that he was ill
    
  • He shammed a headache
    

Related words

• Synonyms: 
  simulate , assume , sham , pretend , affect , dissemble