assiduity
/ˌæsɪˈduːəti/
noun
- Careful and persistent effort or hard work; diligence.
- Through assiduity and patience, the young artist mastered the difficult technique.
- Her assiduity in studying for the exam earned her the highest grade in the class.
- The gardener's assiduity kept the garden blooming even during the drought.
Antonyms