substantial
adj.adj. large in size, value, or importance. You use this to describe something that is big enough to be noticed or to have a real effect.
adj. considerable in importance, value, degree, or amount. Often used to describe physical size or the significance of an abstract concept.
The company made a substantial profit this year.
After the storm, the local council had to provide substantial funding to repair the damaged bridge.
The legal team presented substantial evidence that challenged the witness's credibility, leading the judge to reconsider the initial ruling.
From Middle English substancial, substantiall, from Old French substanciel, substantiel and its etymon Latin substantiālis.
Typically precedes the noun it modifies; frequently used in formal or academic contexts to quantify abstract nouns like 'improvement' or 'change'.