to cover or wrap something completely in or as if in a mantle or cloak.
From 'be-' plus 'mantle' (a loose sleeveless garment or something that covers). This verb means to envelop or drape something thoroughly.
The verb 'mantle' still exists in English (as in 'mantled in snow'), but 'bemantle' never made it into modern usage—yet it's the exact same concept, showing how prefix combinations rise and fall in languages.
Complete word intelligence in one call. Free tier — 50 lookups/day.