To furnish with dress, or equipment, especially those for military service; to equip; to attire; to array.
Origin of accoutre
French accoutrerfrom Old French acoustrerarrange, equipa-to (from Latin ad-ad–) coustrersewcouture
American Heritage Dictionary of the English Language, 5th Edition
From Frenchaccoutrer, from Old French acoustrer, from Vulgar Latin acconsÅ«tÅ«rÄre (“to equip with clothes"), from Latinad (“to") + consÅ«tÅ«ra (“sewing, clothes"), from LatincÅnsuÅ (“to sew together"), from Latincon (“together") + suÅ (“to sew")