усовершенствовать betyr engelsk

upgrade [upgraded, upgrading, upgrades]▼(to improve)
verb
[UK: ˌʌp.ˈɡreɪd] [US: əp.ˈɡreɪd]

perfect [perfected, perfecting, perfects]▼(make perfect)
verb
[UK: pə.ˈfekt] [US: pər.ˈfekt]