Anything described with the word considerably happens substantially or in a major way. A considerably better job is a much better job.

A considerable amount of rain is a significant amount of rain: not just a little rain. So if something occurs considerably, it occurs to a great degree. A considerably bad day is a very bad day. A considerably wealthy person is an extremely wealthy person. A considerably dark sky is a dreary sky indeed. If you feel considerably worse than yesterday, you feel much worse. This word intensifies things. When you see considerably, you know something is being heightened.

Definitions of considerably

adv to a great extent or degree

“painting the room white made it seem considerably (or substantially) larger”
“the house has fallen considerably in value”
substantially, well

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