01 a. Constant in application or attention; devoted; attentive; unremitting.
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1.
Constant in application or attention; devoted; attentive; unremitting.“She grows more assiduous in her attendance.” — Addison.
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2.
Performed with constant diligence or attention; unremitting; persistent; as, assiduous labor.“To weary him with my assiduous cries.” — Milton.
Syn.
Diligent; attentive; sedulous; unwearied; unintermitted; persevering; laborious; indefatigable.