sedulous

 
Pronunciation: /ˈsɛdjʊləs/

adjective

  • (of a person or action) showing dedication and diligence: he watched himself with the most sedulous care

Derivatives

sedulity

Pronunciation: /sɪˈdjuːlɪti/
noun

sedulously

adverb

sedulousness

noun

Origin:

mid 16th century: from Latin sedulus 'zealous' + -ous