assiduous.

Applying sustained care and effort to a task or responsibility.

Use it for

Words that belong together

• assiduous attention
• assiduous researcher

On the page

Assiduous attention restored the map one fragment at a time.

The assiduous researcher noticed a name everyone else had skipped.

Usage notes

Primary category: literary. Forms: Comparative more assiduous; superlative most assiduous where gradation is meaningful. Legacy lexical fields mirror sense 1 only. Use numbered sense fields for all meanings.