Usage patterns
更に〈動詞〉to do something even more/further
He made an even greater effort.
更に〈形容詞〉になるto become even more (adjective)
The weather got even worse.
更に言えばto put it another way; furthermore
Furthermore, this plan will take both time and money.
Expressions
さらにもっとeven further; even more; and then some