Definition of twibill in English:

twibill

noun

archaic
  • A double-bladed battleaxe.

    • ‘Four years later, another shipment of tools went to Bethabara including a twibill, a ‘squaring’ and ‘plaining’ ax and a holdfast all worth £1.16.6.’
    • ‘We have also log building tools (scriber, gouge and twibill).’
    • ‘A round buckler he bore and a huge twibill, which no man of the kindred could well wield save himself; and it was done both blade and shaft with knots and runes in gold; and he loved that twibill well, and called it the Wolf's Sister.’

Origin

Old English twibile ‘axe with two cutting edges’, from twi- ‘double’+ bill.

Pronunciation:

twibill

/ˈtwʌɪbɪl/