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 iridescent is "having a lustrous or attractivve quality.", the definition for embellish is "To decorate.", and the definition for implement is "To carry out or accomplish."

The definition for implausible is "Unbelievable." Used in a sentence: Claudia's implausible excuse failed to convince her teacher. The definition for implement is "to carry out or accomplish.", the definition for condone is "To treat as acceptable.", and the definition for beneficial is "Helpful."

The definition for derelict is "Abandoned." Used in a sentence: The derelict house was condemned as a public hazard. The definition for inflammatory is "tending to excite anger.", the definition for foil is "One that enhances or underscores by contrast.", and the definition for promote is "To contribute to the growth or prosperity of."

The definition for preclude is "To rule out in advance." Used in a sentence: "Having cake now will preclude dessert later," said Amber's mother. The definition for induce is "to influence or cause.", the definition for pathos is "Sympathetic pity.", and the definition for benefactor is "One who offers financial help."

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 catastrophic is "relating to extreme misfortune.", the definition for servile is "Fearfully submissive.", and the definition for repel is "To resist, reject."