Improve
1.Meaning
If you improve something, you cause it to get better.
2.Parts of speech
Adjective: improved
Verb: improve
Noun: improvement
3.Clarification
1.The Transport Department has introduced the Driving improvement (noun) Course since 2002.
2.The classroom looks much improved (adjective) after our decoration.
3.This piece of work is a great improvement (noun) on the one you handed in last time.
4.He works very hard in order to improve (verb) his performance.
5.With the help of medication, her situation is improving (verb).
6.His quality of life has improved (verb) dramatically since the operation.