assiduous
Definitions
Showing great care, attention, and effort.
Marked by persistent, painstaking application.
Examples
The student's assiduous study habits earned her the highest grade in the class.
He was assiduous in his efforts to learn the language, practicing every single day.
The detective conducted an assiduous investigation, leaving no stone unturned in the search for evidence.
Synonyms
diligent sedulous industrious persevering meticulous tireless attentive