A rare or archaic verb meaning to station soldiers in a garrison, to fortify with troops, or to establish a military garrison.
From prefix 'en-' plus 'garrison' (from Old French 'garison', meaning aid or defense, from 'garir' meaning to defend). A garrison is a military fort or the troops stationed there.
Medieval armies would 'engarrison' a castle by moving soldiers into it—but this word died out as English simplified its 'en-' verbs, so now we just say 'garrison' or 'fortify'!
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