semperannual
adjUK /ˌsɛmpəˈɹænjuːəl/
Etymology From semper- + annual.
1
Nonce word, Rare Perpetually perennial.
- [S]upposing Lord Mayor’s footmen to be plumed like estridges — gorgeous as the sun at Midsummer — what must Lord Mayors be, and semperannual Lords, and so on to the pinnacle?1861, George Meredith, Evan Harrington, page 239: