The definition for beneficial is "Helpful." Used in a sentence: there is no doubt that eating vegetables is beneficial to one's health. The definition for disconcert is "to throw into confusion.", the definition for iridescent is "Having a lustrous or attractivve quality.", and the definition for brandish is "To shake or wave menacingly."

The definition for fidelity is "State of being faithful." Used in a sentence: Unlike her fickle friend Benji, May Belle was known for her fidelity. The definition for gargantuan is "gigantic.", the definition for placebo is "An inactive substance used in medical testing.", and the definition for ploy is "A contrived plan."

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 apathetic is "showing little or no emotion.", the definition for elate is "To fill with joy.", and the definition for straddle is "To favor opposing sides."

The definition for colossal is "Immense, enormous." Used in a sentence: After pushing with all his might, Frank realized he could never move the colossal boulder. The definition for equitable is "fair and equal.", the definition for promote is "To contribute to the growth or prosperity of.", and the definition for epistolary is "Contained or carried on in letters."

The definition for meticulous is "Extrememly careful regarding details." Used in a sentence: The meticulous detective found every shred of evidence at the crime scene. The definition for mandate is "an official order or commission to do something.", the definition for melee is "A tumultuous fight among several people.", and the definition for corroborate is "To support with evidence."