labor improbus /lāˈbör im-prōˈbəs or laˈbor im-proˈbŭs/ (Latin)

Persistent, dogged labour

• nig-nogs
• nigrescence
• nigrescences
• nigrescent
• nigricant
• nigrified
• nigrifies
• nigrify
• nigrifying
• Nigritian
• nigritude
• nigritudes
• nigromancies
• nigromancy
• nigrosin
• nigrosine
• nigrosines
• nigrosins
• NIH
• nihil
• nihil ad rem
• nihilism
• nihilisms
• nihilist
• nihilistic