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contradictionary 

a dictionary which gives you only the opposites of the words you are looking for...
People used to laugh at me a lot when I first started learning English...It took me days to understand that I was looking up for the words in the contradictionary !!!

Contradictionary 

When someone contradicts themselves
That’s contradictionary!
Contradictionary by Brien July 28, 2022

Urban contradictionary

When someone thinks they know what a word means, they look it up on urban dictionary, and are presented with a word that is totally opposite of their expectations. (Also known as the entire site).
sean: "I went to urban dictionary and typed in 'wedding', and it came up with 'the procedure used to artificially inseminate cows'. WTF! they should call it urban CONTRAdictionary.

contradictionalist 

Someone who frequently says and/or does one thing one day and then says or does the opposite later on.
Trump is such a contradictionalist about Russia's involvement in the elections.
contradictionalist by Honey5683 August 8, 2018

Contractionary Thermodynamics

The counterpart to expansionary thermodynamics, studying energy behavior in systems undergoing contraction—gravitational collapse, cooling and shrinking, implosions, or any process where volume decreases. In such systems, energy may appear to concentrate, temperatures rise, and entropy dynamics reverse locally. Black holes are a prime example: as matter collapses, gravitational energy transforms into heat, and the system's behavior defies the expectations of classical stationary thermodynamics. Contractionary thermodynamics explores how contraction affects work extraction, entropy production, and the arrow of time. It suggests that just as expansion breaks time-translation symmetry, contraction does too, but with opposite effects.
Example: "The star collapsed into a black hole, and contractionary thermodynamics explained how energy that seemed lost during expansion was now concentrated into a singularity—a reversal of cosmic energy flow."