inverse in WordNet English dictionary

1. something inverted in sequence or character or effect
   "when the direct approach failed he tried the inverse"
   inverse  opposite 
   

1. opposite in nature or effect or relation to another quantity
   "a term is in inverse proportion to another term if it increases (or decreases) as the other decreases (or increases)"
   inverse 
   
2. reversed (turned backward) in order or nature or effect
   inverse  reverse