fasten's e'en
noun
fast·en's e'en
ˌfasᵊnˈzēn
variants or fasten's
ˈfasᵊnz
dialectal, British
: shrove tuesday
Word History
Etymology
Middle English (Scots) fastinnys evin, from fastinnys (genitive of Middle English—Sc—fastin fast, variant of Middle English fasten) + evin (variant of Middle English even evening, eve)