He is assiduous in reading as many Russian books as possible.
Source: tatoeba (5586434)
Ranked by relevance and common usage.
Keep "assiduous" when the sentence already sounds natural, when a synonym would add unintended emphasis, or when readers need the most familiar wording. A synonym should clarify or sharpen the message, not simply make the sentence look more varied.
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Choose a synonym only if it keeps the core idea of "assiduous" intact in the sentence you are editing.
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Review note: Synonym lists are ranked with lexical data and reviewed for practical writing value. Use the comparison notes, sentence evidence, and source labels together; a high-ranking synonym can still be wrong when the audience, register, or grammar changes.
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7 total sentences available.
He is assiduous in reading as many Russian books as possible.
Source: tatoeba (5586434)
He was officious in the right time and place, quiet as a lamb when his patron seemed inclined to study or to muse, active and assiduous to assist or divert him whenever it seemed to be wished.
Source: wiktionary
He died after three weeks' illness, during which Mrs. Penniman, as well as his daughter, had been assiduous at his bedside.
Source: wiktionary
A good deal of assiduous attention had enabled Henry to win this place in her affections.
Source: wiktionary
Showing 4 of 7 available sentences.
Closest matches include active, advertent, agog, alert, all ears.
Compare the replacement against real sentence context. This entry includes sample sentences so you can check tone, grammar, and meaning before swapping words.