よりさらに

even more than

→ より
phrase Rare #41,399
even more than Used to emphasize that something is greater or more intense in comparison with something else.
JA: 今年は去年よりさらに寒い。
EN: This year is even colder than last year.

"何も感じない"よりさらに感じないくらいよ

It's even less than feeling nothing.

— ラ・ラ・ランド (2016)

キャッスルフリートの港務長は、トーフリートの港務長よりさらに愛想がなかった。

The harbormaster at Castlefleet was even less friendly than the one at Torfleet.