COMBUST Meaning of COMBUST in English [ kəm'bʌst ]■ verb burn or be burnt by fire.Derivatives~ible adjective &noun~or noun OriginC15 (earlier (ME) as ~ion ): from obs. ~ 'burnt', from L. ~- , comburere 'burn up'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004