Dulle

Part of speech: adjective

Definitions

1. An archaic Middle English adjective for someone mentally slow or foolish ; describing an edge, blade or sense that has lost its keenness
2. Old English-era term meaning slow of understanding or dim-witted ; used of a cutting edge or point that is blunt and no longer sharp
3. Middle English adjective describing a person who is stupid or sluggish in mind ; also describing a tool or edge that has become blunt

Etymology: "Dulle" is a German word, borrowed into English from North German, where it is a variant of "Dull," the name of a notorious old device. In German it is used for a type of cargo-handling or rigging term and the word carries the same sense of a "dull" or blunt tool, so English speakers adopted it in that specific technical sense rather than as an everyday word.