dil ‧ i ‧ gent /ˈdɪlədʒ ə nt, ˈdɪlɪdʒ ə nt/ BrE AmE adjective
[ Date: 1300-1400 ; Language: French ; Origin: Latin , present participle of diligere 'to put high value on, love' ]
someone who is diligent works hard and is careful and thorough:
a diligent student
—diligently adverb :
They worked diligently all morning.
—diligence noun [uncountable]