The verb is "to improve".
That's called the "full infinitive" of the verb. It can take other forms, but that's the basic one.
The word 'improve' is not an adjective. The word 'improve' is a verb, meaning to make better or to increase in value; a word for an action.The abstract noun forms of the verb to improve are improvement and the gerund, improving.
Noun forms for the verb 'improve' are improvablity and improvement.
a verb form is dignify
Yes, the noun improvement is an abstract noun, a word a change for the better; progress in development; a word for a concept.
The verb form of the word hard is harden.
The verb form is evolve (evolves, evolving, evolved).
Conclude is the verb form; conclude, concludes, concluding, concluded. The noun form of the word is conclusion.
The verb form of the word "nation" is "nationalize."
The word "rain" is a verb in its base form.
to modernize
The verb form of the word "inquiry" is "inquire."
The verb form is enthuse.