Usage Note
abirren (less common than abkommen or sich verirren) means to deviate from a route or track, with a literary or slightly formal register. It is found in hiking and travel writing: vom Pfad abirren (to stray from the path).
Examples
"Im dichten Nebel irrten sie vom markierten Bergpfad ab."
Natural Translation
In the thick fog they strayed from the marked mountain trail.
Literal Translation
In the dense fog they strayed off from the marked mountain-path.
Related Words
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