How to pronounce combust:
Example: "The sun burned off the fog"
Example: "Marsh gases ignited suddenly"
Example: "The professor combusted when the student didn't know the answer to a very elementary question"
Example: "Riots combusted pakistan after the u.s. air attacks on afghanistan"
Example: "Maple wood burns well"
That which undergoes burning.
Burnt.
In close conjunction with the sun (so that its astrological influence is "burnt up"), sometimes specified to be within 8 degrees 30'.