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 buffer is "protective barrier.", the definition for benefactor is "One who offers financial help.", and the definition for intricate is "Having complex and interrelated parts."

The definition for placebo is "An inactive substance used in medical testing." Used in a sentence: Tom, who had taken the placebo, found that his allergy symptoms did not go away. The definition for regale is "to amuse.", the definition for naive is "Lacking worldy wisdom.", and the definition for extant is "Currently existing."

The definition for prune is "To reduce by removing excess." Used in a sentence: The candidate pruned his speech so he would not exceed the time limit. The definition for exception is "a case to which the rule does not apply.", the definition for untenable is "Not able to be defended.", and the definition for rhapsody is "State of great happiness."

The definition for stern is "Harsh, severe." Used in a sentence: The stern principal canceled the prom after the seniors played a silly prank. The definition for benevolent is "kind, helpful.", the definition for comprehensible is "Understandable.", and the definition for punctual is "On time."

The definition for appalling is "Inspiring dismay or disgust." Used in a sentence: Hector found his roommate's habit of leaving his dirty socks on the floor appalling. The definition for finite is "having definite limits.", the definition for onset is "Beginning.", and the definition for apathetic is "Showing little or no emotion."