1
cramp;sprain;crick;strain (muscle)
2
unreasonableness;absurdity
3
illogical;unreasonable
4
misdirected;misplaced;wrong (of estimate, guess)
君が罰をうけるのは筋違いだと思った。
We thought it was absurd that you got punished.
Other forms
すじ違い 【すじちがい】