ETYM Cf. French considérable.
Large or relatively large in number or amount or extent or degree.

Pleasing by delicacy or grace; not imposing

ETYM French substantiel, Latin substantialis.
1. Being the essence or essential element of a thing; SYN. substantive, in essence.
2. Having substance or capable of being treated as fact; not imaginary; SYN. real, material.

In a manner or to a degree not trifling or unimportant; greatly; much.