GRE TOEFL combustible Definition Capable of catching fire and burning easily. Example "Gasoline is a highly combustible liquid." Sign in to save GRE PDF — $25 TOEFL PDF — $25 ← combine combustion → Study tips featuring "combustible" Write GRE Words Into Your Own Sentences TOEFL Academic Vocabulary: Study by Topic Related words GRE awe GRE smithereens GRE abacus SAT abase GRE abash GRE abate GRE abbreviate GRE abbreviation SAT abdicate SAT abdomen GRE abduct GRE aberrant