What is the meaning of Ardu?

alternative form of wardum

I burn.

inflection of ard:

1. vocative/accusative plural masculine
2. comparative degree

vocative/accusative plural masculine

comparative degree

to burn

steep (of a near-vertical gradient)

arduous (needing or using up much energy)

imperative of ardi

steep (of a near-vertical gradient)

arduous, needing or using up much energy, difficult

alternative form of lardu: lard (fat from the abdomen of a pig)

Source: wiktionary.org