hard working; quietly and steadily persevering especially in detail or exactness
Diligent in a sentence
His diligent work ethic earned him the promotion.
Synonyms for diligent
hardworking
careful
thorough
Antonyms for diligent
lazy
careless
negligent
Practice diligent on real SAT questions
Vocabulary like diligent appears on the Digital SAT in Words-in-Context questions, where you choose the word that fits a passage's meaning and tone. You can also drill this word with vocabulary flashcards.