assiduous
showing great care, effort, and persistence in doing something
Examples
- Emma was assiduous in her research, checking every source twice.
- Through assiduous practice, Leo finally mastered the piano piece.
- The assistant kept an assiduous record of every meeting.
All Words
- vivacious
full of lively energy and enthusiasm; spirited and animated in manner
- sanguine
feeling or showing confident optimism about a situation, even when things seem difficult
- fastidious
paying extremely close attention to detail and being hard to please; showing great care about accuracy or cleanliness