assiduous
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- s marked by care and persistent effort
her assiduous attempts to learn French
assiduous research
- The rookie quarterback looked over his playbook with such assiduous study that he soon became more comfortable with his performance on the field.
- Mark is an assiduous worker and is never distracted by the unholy work ethics of his colleagues.
- After the software crash, the engineers worked assiduously whole night to get the system back on rails.