The definition for combustion is "Act of burning." Used in a sentence: Campers must use fire with great caution to prevent combustion of the parched brush. The definition for advantageous is "giving an advantage.", the definition for rehash is "To discuss again.", and the definition for pallid is "Lacking color."

The definition for demeanor is "Behavior towards others." Used in a sentence: Carlos was well liked because of his charming demeanor. The definition for untenable is "not able to be defended.", the definition for catastrophic is "Relating to extreme misfortune.", and the definition for incisive is "Impressively direct and decisive."

The definition for punctual is "On time." Used in a sentence: Ron was worried when the usually punctual Amanda was late for the show. The definition for sociable is "inclined to seek companionship.", the definition for straddle is "To favor opposing sides.", and the definition for serenity is "Calmness."

The definition for corrosive is "Bitingly sarcastic." Used in a sentence: The cruel Estella's corrosive comments made Pip cry. The definition for inflammatory is "tending to excite anger.", the definition for abate is "Become less in amount or intensity.", and the definition for naive is "Lacking worldy wisdom."

The definition for augment is "To make greater." Used in a sentence: Wanda read the dictionary every night to augment her vocabulary. The definition for implausible is "unbelievable.", the definition for serenity is "Calmness.", and the definition for colossal is "Immense, enormous."