clumsy: [16] When clumsy first appeared on the scene around 1600, both it and the presumably related but now obsolete clumse were used not only for ‘awkward’ but also for ‘numb with cold’. This, and the fact that the word’s nearest apparent relatives are Scandinavian (such as Swedish dialect klumsig ‘numb, clumsy’), suggests that the notion originally contained in them was of being torpid from cold – so cold that one is sluggish and cannot coordinate one’s actions. [clumsy etymology, clumsy origin, 英语词源]