Why Does Firmly Mean?

When you do something firmly, you do it with strength or in a secure way, like when you shut a door firmly behind you so your cat can't get out.

Why does permanently mean?

existing perpetually; everlasting, especially without significant change. intended to exist or function for a long, indefinite period without regard to unforeseeable conditions: a permanent employee; the permanent headquarters of the United Nations. long-lasting or nonfading: permanent pleating; permanent ink.

Why does sparingly mean?

Sparingly is defined as something done in a frugal manner, or something done in a manner meant to conserve what is remaining. An example of sparingly is when you add only a tiny dash of salt because you are running out and you want to use as little as possible.