com- [co-, cog-, col-, con-, cor-]

1. The process of burning.
2. A chemical change; especially, oxidation, accompanied by the production of heat and light.
3. Violent anger or agitation: "Combustion within the populace slowly built up to the point of revolution."
4. Burning; consumption by fire; the development of light and heat from the chemical combination of a substance with oxygen.
5. Etymology: from Latin combustus, past participle of comburere, "to burn up"; from urere "to burn".

Combustion includes thermal, hydrodynamic, and chemical processes. It starts with the mixing of fuel and an oxidant, and sometimes in the presence of other species or catalyst.

The combustion products include heat, light, chemical species, pollutants, mechanical work, and plasma.

1. To pledge devotion or dedication to someone or something: "He wasn't yet ready to commit to the relationship."
2. To devote or pledge something; such as, time or money to an undertaking.
3. To do something wrong or illegal: "He was caught committing a felony."
4. To entrust something or someone to another person for protection>
5. To consign or record something in order to preserve it; "He committed the names to memory."
6. To give something over for destruction or disposal.
7. To confine someone legally to an institution; such as, a prison or mental health facility.
8. To refer a bill to a legislative committee for review.
9. Etymology: from about 1390, it came from Latin committere, "to bring together"; from com-, "together" + mittere, "to put, to send".

1. To give or to interchange thoughts, feelings, information, or the like, by writing, speaking, etc.
2. To express thoughts, feelings, or information easily or effectively.