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Showing or characterized by persistent attention or untiring application: an assiduous worker who strove for perfection; did assiduous research before writing the book. See Synonyms at diligent.
[From Latin assiduus, from assidēre, to attend to : ad-, ad- + sedēre, to sit; see sed- in Indo-European roots.]
1. hard-working; persevering: an assiduous researcher.
2. undertaken with perseverance and care: assiduous editing.
[C16: from Latin assiduus sitting down to (something), from assidēre to sit beside, from sedēre to sit]
as•sid•u•ous(əˈsɪdʒ u əs)
1. constant; unremitting: assiduous reading.
2. working diligently at a task; persevering; industrious: an assiduous student.
[1530–40; < Latin assiduus=assid(ēre) to sit near]
Switch to new thesaurus
|Adj.||1.||assiduous - marked by care and persistent effort; "her assiduous attempts to learn French"; "assiduous research"; "sedulous pursuit of legal and moral principles"|
diligent - characterized by care and perseverance in carrying out tasks; "a diligent detective investigates all clues"; "a diligent search of the files"