reverse

adjective

1
turning in the opposite direction
2
(American football) a running play in which a back running in one direction hands the ball to a back running in the opposite direction
3
the gears by which the motion of a machine can be reversed
4
the side of a coin or medal that does not bear the principal design
5
an unfortunate happening that hinders or impedes; something that is thwarting or frustrating
6
a relation of direct opposition
we thought Sue was older than Bill but just the reverse was true

1
change to the contrary
The trend was reversed
the tides turned against him
2
turn inside out or upside down
3
reverse the position, order, relation, or condition of
when forming a question, invert the subject and the verb
4
rule against
The Republicans were overruled when the House voted on the bill
5
cancel officially
He revoked the ban on smoking
lift an embargo

Also useful for “reverse”:Scrabble— High-value letters — see what it scores