IPA: /ˈɑːrdʒuəsli/
KK: /ˈɑrdʒuəsli/
In a way that requires a lot of effort and hard work.
She worked arduously to complete the project on time.
Arduously → It is formed from "arduus" (from Latin, meaning steep or difficult) and the suffix "-ly" (meaning in a manner of). The word "arduously" means in a manner that is steep or difficult, often referring to tasks that require great effort.
Think of the word 'arduous' meaning difficult or steep, and remember that 'arduously' describes doing something in a difficult manner.