the direct opposite
antithesis - opposite
'Antithesis’ may look like a complicated word, but its meaning is in fact quite simple. It means the opposite of somebody or something. Therefore, war is the antithesis of peace, love is the antithesis of hate, wealth is the antithesis of poverty, etc.
Jack and I don’t work well together. His personality is the antithesis of mine.
I found Sarah to be very intelligent, but her brashness is the antithesis of what I’m looking for in an intern.
My instructions did not advocate a laissez-faire approach to managing the project. In fact, that was the antithesis of my meaning.