Diligent :: Diligent (a.) Prosecuted with careful attention and effort; careful; painstaking; not careless or negligent.
Diligent :: Diligent (a.) Interestedly and perseveringly attentive; steady and earnest in application to a subject or pursuit; assiduous; industrious.
Diligently :: Diligently (adv.) In a diligent manner; not carelessly; not negligently; with industry or assiduity.