noun, の adjective
It is reverse to the theory! What is going on? Things aren't right. There must be some kind of paradox going on, where all theories are reversed! D:
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
It may sound paradoxical, but many long-married old people admit that some differences can spice up a relationship.