coat

English coat comes from Middle English cote, borrowed from Old French cote or cotte, meaning an outer garment with sleeves. That French word traces back to Latin cotta, an undercoat or tunic, which itself came from Proto-Germanic *kuttô, meaning cowl or woolen cloth.

The word moved from a general Germanic term for woolen cloth, into Latin as a name for a simple tunic, then through French as a fitted outer garment with sleeves, arriving in English with much the same sense it holds today.

It's cognate with German Kotze, a coarse woolen blanket or cape, and with Middle Dutch cote — all pointing back to that same Germanic root for woolen cloth.