升級 meaning in English

escalate [escalated, escalating, escalates]▼(to intensify)
verb
[UK: ˈe.skə.leɪt] [US: ˈe.skə.ˌlet]

level [levelled, levelling, levels]▼(to progress to the next level)
verb
[UK: ˈlev.l̩] [US: ˈlev.l̩]

escalation [escalations]▼(a deliberate or premeditated increase in the violence or geographic scope of a conflict)
noun
[UK: ˌe.skə.ˈleɪʃ.n̩] [US: ˌe.skə.ˈleɪʃ.n̩]

upgrade [upgrades]▼(an improved component or replacement item)
noun
[UK: ˌʌp.ˈɡreɪd] [US: əp.ˈɡreɪd]