An archaic or variant spelling of 'garrison,' a military force stationed to defend a fort, town, or strategic location.
From Old French 'garrison,' derived from 'garnir' (to equip, furnish, prepare), since a garrison equips a place with defensive forces.
The spelling 'garnison' shows how 'garrison' and 'garnish' actually share the same French root 'garnir'—both mean to furnish or equip something, just in different ways!
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