01 n. Constant or close application or attention, particularly to some business or enterprise; diligence.
pl.
Assiduities
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1.
Constant or close application or attention, particularly to some business or enterprise; diligence.“I have, with much pains and assiduity, qualified myself for a nomenclator.” — Addison.
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2.
Studied and persevering attention to a person; -- usually in the plural.