ichidan verb
misstep; stray from the path
Literally to step wrongly or lose one's footing; also used figuratively for straying from the correct path or making a mistake in conduct.
暗くて階段を踏み違えた。
It was dark and I misstepped on the stairs.
彼は一度踏み違えてから、人
After he strayed once, his life changed.