Here are some common words derived from "ignis" and their meanings:
Directly derived:
* Ignite: to set fire to; to cause to burn.
* Ignition: the act of setting something on fire.
* Ignitable: capable of being set on fire.
Other related words:
* Incinerate: to burn to ashes.
* Incandescent: emitting light as a result of being heated.
* Ignominious: characterized by disgrace or shame.
* Ignorance: lack of knowledge or information.
* Ignoble: of low character or birth.
Remember: "Ignis" is a root word, so it's not always present in its full form in English words. Sometimes it's combined with other roots or suffixes to create new meanings.