Englishfor English speakers
diligent
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adjective
(= persevering)
quietly and steadily persevering especially in detail or exactness
a diligent (or patient) worker
with persevering (or patient) industry she revived the failing business
—
adjective
characterized by care and perseverance in carrying out tasks
a diligent detective investigates all clues
a diligent search of the files
inventor
Noun
—
An inventor is someone who invents things.