sedulous
Concise Oxford English Dictionary © 2008 Oxford University Press:
sedulous /ˈsɛdjʊləs/
▶adjective showing dedication and diligence.
– derivatives
sedulity /sɪˈdjuːlɪti/ noun,
sedulously adverb,
sedulousness noun.
sedulity /sɪˈdjuːlɪti/ noun,
sedulously adverb,
sedulousness noun.
'sedulous' also found in these Oxford entries:

