say it: DIL-i-juhnt
diligent is an adjective meaning "quietly and steadily persevering especially in detail or exactness". It carries 2 recorded senses.
quietly and steadily persevering especially in detail or exactness
“a diligent (or patient) worker”
“with persevering (or patient) industry she revived the failing business”
characterized by care and perseverance in carrying out tasks
“a diligent detective investigates all clues”
“a diligent search of the files”
Definitions, synonyms and semantic relations for diligent come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.