The definition for rancorous is "Marked by deep ill–will." Used in a sentence: The rancorous competition between the two chess clubs actually ended in a brawl. The definition for buffer is "protective barrier.", the definition for naive is "Lacking worldy wisdom.", and the definition for compulsion is "An irresistible impulse."

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 commemorate is "to mark by a ceremony.", the definition for polarize is "To break up into opposing groups.", and the definition for gargantuan is "Gigantic."

The definition for commemorate is "To mark by a ceremony." Used in a sentence: Each year, the Franklins commemorate their anniversary by visiting the site of their first date. The definition for combustion is "act of burning.", the definition for periodic is "Occurring at regular intervals.", and the definition for garish is "Offensively bright."

The definition for euphoria is "Feeling of great happiness." Used in a sentence: Cassandra was overcome with euphoria when she met her long–lost sister. The definition for obnoxious is "highly offensive.", the definition for fickle is "Lacking constancy, changeable.", and the definition for apathetic is "Showing little or no emotion."

The definition for polarize is "To break up into opposing groups." Used in a sentence: Thelma tended to polarize discussions rather than to encourage compromise. The definition for catastrophic is "relating to extreme misfortune.", the definition for trove is "Valuable collection.", and the definition for flaw is "An imperfection."