Updated: 5 days ago
Pronunciation: [ uh-sij-oo-uhs ]
constant in application or effort; working diligently at a task; persevering; industrious; meticulous
Origin: 1530; Latin
Etymology: from Latin assiduus, from assidere ‘be engaged in doing’ (see assess), + -ous
Example: In regards to his attendance in class, he was assiduous.