ign-, igni-, ignis- +

(Latin: fire, burn)

Ab igne ignem. (Latin term)
Translation: "From fire, fire."

Also translated as, "As you sow, so shall you reap."

This suggests that anyone should expect to get only what he or she puts into a project or effort.

The visiting minister, who was very outspoken, exhorted the congregation, ab igne ignem.

autoignition (s), autoignitions (pl) (noun forms); spontaneous combustion
1. Spontaneous ignition of some or all of the fuel-air mixture in the combustion chamber of an internal combustion engine.
2. The spontaneous ignition of fuel when introduced into the combustion chamber of an internal-combustion engine, as a result either of glowing carbon in the chamber or of the heat of compression.
gelignite (s) (noun)
1. An explosive mixture of nitroglycerin, guncotton, wood pulp, and potassium nitrate.
2. A substance used to cause explosions; especially, under water.
igneous (adjective)
1. Of fire, fiery; typical of fire; relating to or characteristic of fire.
2. In geology, formed by solidification from a molten or partially molten state (used of rocks or relating to rocks so formed): "Granite and basalt are igneous rocks."
3. Relating to a rock that was formed by solidification from molten or partly molten material; one of the three principal classification of rocks along with metamorphic and sedimentary: "Such materials are a result of, or are produced by, the action of great heat."
ignescent (adjective)
A reference to something that produces sparks of fire or that which can emit sparks or burst into flame: "He was using ignescent flint to cause sparks."
ignible (adjective)
Something which is able to cause sparks or fire: "Since he had ignible trash, it was easy to burn all of it in the fire place."
ignic (adjective)
Of or pertaining to fire: "The ignic heat from the fireplace helped to keep them warm during the winter."
ignicolist (s), ignicolists (pl) (noun forms)
A fire-worshipper or fire-worshippers: "There were ignicolists who were known to worship fire as a form of a god."
igniextirpation (s), igniextirpations (pl) (noun forms)
1. A surgical procedure in which one or more organs are removed by use of a cautery.
2. Cautery excisions (using devices to destroy tissues by electricity, freezing, heat, or corrosive chemicals).
igniferous, more igniferous, most igniferous (adjective)
Referring to something that is capable of producing a fire: "Gas is one of the most igniferous products available for starting fires."
Producing fire.
Flowing with fire.
ignify, ignifying
To set on fire, to cause to burn.
Produced by fire, or by the action of fire.
Any surgical procedure in which a cautery is used to perform all or part of the operation.

Cross references of word groups that are related, directly, indirectly, or partly to: "fire, burn, glow, or ashes": ars-, ard-; -bust; cand-, cend-; caust-, caut-; crema-; ciner-; ether-; flagr-; flam-; focus, foci-; fulg-; gehenna-; phleg-; phlog-; pyreto-, -pyrexia; pyr-; spod- (ashes; waste); volcan-.