Englishfor English speakers
improvement
Noun
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An improvement makes something better; it improves something.
The improvement of this entry was well done.
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Improvement is the state of being improved or bettered.
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An improvement is an increase, advance, or growth.
assessment
Noun
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An assessment of a person, idea, skill, process, etc. is a judgement or measurement of them.
The results of your recent job assessment are excellent.
The buyers have to make their own assessment of the value.