Opposite in order, relation, or effect; reversed; inverted; reciprocal; -- opposed to direct.
Inverted; having a position or mode of attachment the reverse of that which is usual.
Opposite in nature and effect; -- said with reference to any two operations, which, when both are performed in succession upon any quantity, reproduce that quantity; as, multiplication is the inverse operation to division. The symbol of an inverse operation is the symbol of the direct operation with -1 as an index. Thus sin-1 x means the arc whose sine is x.
I've developed a theory that there's an inverse relationship between money and imagination. That if you've got lots of imagination then you don't really need much money, and if you've got lots of money then you won't bother with much imagination. Alan Moore