Contradiction
Inconsistency
noun, verbal noun, の adjective
A spear and a shield. Totally different things. Not at all like each other. A complete contradiction.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
それってすごく矛盾した状況じゃない？
They’re really contradicting circumstances, aren’t they?