The definition for oblivious is "Lacking awareness." Used in a sentence: Love–struck Charlie was oblivious to everyone but the object of his affection. The definition for catastrophic is "relating to extreme misfortune.", the definition for diffident is "Lacking self–confidence.", and the definition for colossal is "Immense, enormous."

The definition for repel is "To resist, reject." Used in a sentence: The soldiers made a massive charge to repel the invaders. The definition for revoke is "to cancel by taking back.", the definition for abate is "Become less in amount or intensity.", and the definition for appalling is "Inspiring dismay or disgust."

The definition for implement is "To carry out or accomplish." Used in a sentence: All Randolph needed to implement his plan was a moonless night and a long rope. The definition for corroborate is "to support with evidence.", the definition for clarity is "Clearness.", and the definition for incisive is "Impressively direct and decisive."

The definition for clarity is "Clearness." Used in a sentence: The refreshing water in the mountain stream was remarkable for its clarity. The definition for appalling is "inspiring dismay or disgust.", the definition for epistolary is "Contained or carried on in letters.", and the definition for lurid is "Causing horror, shocking."

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 refurbish is "to brighten or freshen.", the definition for melee is "A tumultuous fight among several people.", and the definition for prudent is "Marked by wisdom, shrewd."