Answer: sedulous

AnswerCrossword Clue
SEDULOUSIndefatigable
SEDULOUSDiligent; persevering.
SEDULOUSSteadily industrious.
SEDULOUSAssiduous.
SEDULOUSDiligent
SEDULOUSPersevering
sedulousdiligent in application or attention; persevering; assiduous
sedulousdiligent (persevering)
sedulouspersistently or carefully maintained