Hempen means made from the tough fibre of a plant. A hempen rope, hempen cloth, the hempen sail.
Hemp made almost every rope and sail in the age of sail, and navies planted it as a strategic crop. The -en ending is the old way of forming such adjectives, as in wooden and golden.
1adjectivehempenMade from the tough fibre of a plant.
“The prisoner's hands were tied with a rough hempen cord.”
hempen is a material.
Old English haenepen is hemp plus the old adjective ending -en, as in wooden.
Proto-West Germanic
*hanapīn — hempen, made of hemp
Old English
*hænepen — made of hemp, hempen
Middle English
hempen
English, today
hempen
From Middle English hempen, hempyn, from Old English hænepen (“made of hemp, hempen”), from Proto-West Germanic hanapīn (“hempen, made of hemp”), equivalent to hemp + en. Cognate with West Frisian himpen (“hempen”), Dutch hennepen (“hempen”), German Low German hempen (“hempen”), German hanfen, hänfen (“hempen”). More at hemp.
Etymology from Wiktionary, CC BY-SA