Answer: inverse

AnswerCrossword Clue
INVERSEReciprocal
INVERSEWrong side out
INVERSEOpposite
INVERSEDivision, vis- -vis multiplication
INVERSEDirect opposite
INVERSETurned upside down
INVERSECounter
INVERSEOpposite.
INVERSEDirectly opposite.
INVERSE2, to 1-2
INVERSETrig calculation
INVERSE1-3, to 3
inversea direct opposite / to turn something into the opposite
inversereversed in position or direction