revealing

Adjective

• showing or making known
  • her dress was scanty and revealing
    

• disclosing unintentionally
  • a telling smile
    
  • a telltale panel of lights
    
  • a telltale patch of oil on the water marked where the boat went down
    

Noun

• the speech act of making something evident

Related words

• Synonyms: 
  telling , telltale(a) , disclosure , revelation