surcoat
n.
"outer coat," early 14c., from Old French surcote "outer garment," from sur- "on, upon, over, above" (see sur-(1)) + cote (see coat, n.).
〔李〕[sur-=over在⋯之上；coat n.上衣 →] n.an outer coat or garment of rich material，often worn by knights over their ar-mor（中世纪骑士穿在盔甲上的）外衣