This is the 11855th most frequent French word.
substantiel
Substantial; significant; considerable.
In this sentence, 'substantiel' is used to describe the donation as being significant or considerable in amount or impact.
Il a fait un don substantiel à l'association caritative.
He made a substantial donation to the charity.
Here, 'substantiel' is employed to qualify the evidence as being strong, important, or weighty in its support.
Cette étude contient des preuves substantielles.
This study contains substantial evidence.
In this usage, 'substantiel' refers to the difference as considerable or worthy of attention due to its magnitude.