This is the 17770th most frequent Russian word.
улучшил
Improved.
Indicates improvement or enhancement in abilities or qualities.
Он улучшил свои навыки программирования.
He improved his programming skills.
Denotes an upgrade or betterment in the standard of goods or services.
Эта компания улучшила качество своих продуктов.
This company improved the quality of its products.
Describes enhancement or restoration of a structural or physical state.