To allow livestock to feed and graze on a particular area of land with grass or vegetation.
From the prefix 'de-' (meaning thoroughly or completely) combined with 'pasture' (from Latin 'pastura'). The word became common in Middle English for agricultural practices.
The 'de-' prefix here doesn't mean 'remove' but rather 'to perform the action of'—so 'depasture' means to fully and thoroughly let animals use pasture, showing how prefixes could transform verbs!
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