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 melodious is "having a pleasing melody.", the definition for inviolable is "Secure from assault of trespass.", and the definition for duplicity is "Deceptive thought, speech, or action."

The definition for periodic is "Occurring at regular intervals." Used in a sentence: The periodic innterruptions of the cuckoo clock prevented Li from concentrating. The definition for revoke is "to cancel by taking back.", the definition for comprehensible is "Understandable.", and the definition for fidelity is "State of being faithful."

The definition for futile is "Without purpose, completely ineffective." Used in a sentence: Arguing with Andrew is futile because he never changes his mind. The definition for facade is "false or superficial appearance.", the definition for gargantuan is "Gigantic.", and the definition for untenable is "Not able to be defended."

The definition for moderate is "Tending toward the average." Used in a sentence: The best–selling writer was disappointed; his new novel was only a moderate success. The definition for ecstatic is "overwhelmingly emotional.", the definition for illuminate is "To make clear.", and the definition for entangle is "To involve in trouble."

The definition for supple is "Flexible." Used in a sentence: The supple leather coat draped like soft cloth around her shoulders. The definition for incisive is "impressively direct and decisive.", the definition for condone is "To treat as acceptable.", and the definition for brandish is "To shake or wave menacingly."