The definition for iridescent is "Having a lustrous or attractivve quality." Used in a sentence: The movie star's iridescent presence charmed even the hardened reporter. The definition for commemorate is "to mark by a ceremony.", the definition for prominence is "Importance.", and the definition for dubious is "Questionable."

The definition for conduit is "Means for transmitting or distributing." Used in a sentence: Jason, a notorious gossip, was a conduit for information about his friends. The definition for combustion is "act of burning.", the definition for egotist is "Self–important person.", and the definition for negate is "To make invalid."

The definition for procrastinate is "To put off intentionally." Used in a sentence: Yvonne's father urged, "Don't procrastinate. Clean your room right away." The definition for gargantuan is "gigantic.", the definition for authoritarian is "Favoring absolute obedience to authority.", and the definition for exception is "A case to which the rule does not apply."

The definition for demean is "To lower status." Used in a sentence: The embarrassing photograph demeaned the candidate in the eyes of the voters. The definition for buffoonery is "foolish behavior.", the definition for polarize is "To break up into opposing groups.", and the definition for punctual is "On time."

The definition for drub is "To defeat decisively." Used in a sentence: The powerful young boxer drubbed the longtime champion. The definition for drab is "dull, monotonous.", the definition for salvage is "To save from ruin.", and the definition for advantageous is "Giving an advantage."