COMBUSTS

Verb

combusts

Third-person singular simple present indicative form of combust

Source: Wiktionary

COMBUST

Com*bust", a. Etym: [L. combustus, p. p. of comburere to burn up; com- + burere (only in comp.), of uncertian origin; cf. bustum fineral pyre, prurire to itch, pruna a live coal, Gr. plush to burn.]

1. Burnt; consumed. [Obs.] Chaucer.

2. (Astron.)

Definition: So near the sun as to be obscured or eclipsed by his light, as the moon or planets when not more than eight degrees and a half from the sun. [Obs.] Planets that are oft combust. Milton.

Source: Webster’s Unabridged Dictionary 1913 Edition