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 periodic is "occurring at regular intervals.", the definition for implement is "To carry out or accomplish.", and the definition for punctual is "On time."

The definition for corrosive is "Bitingly sarcastic." Used in a sentence: The cruel Estella's corrosive comments made Pip cry. The definition for unscrupulous is "lacking principles.", the definition for mundane is "Practical, ordinary.", and the definition for inflammatory is "Tending to excite anger."

The definition for retroactive is "effective as of a prior time or condition." Used in a sentence: The retroactive law made even past infractions punishable. The definition for disconcert is "to throw into confusion.", the definition for civility is "Politeness.", and the definition for dubious is "Questionable."

The definition for unscrupulous is "Lacking principles." Used in a sentence: The unscrupulous salesman was fired for lying to his customers. The definition for lurid is "causing horror, shocking.", the definition for illuminate is "To make clear.", and the definition for augment is "To make greater."

The definition for advantageous is "Giving an advantage." Used in a sentence: The house's location in the best school district was advantageous to the seller. The definition for frugal is "thrifty, cheap.", the definition for intricate is "Having complex and interrelated parts.", and the definition for straddle is "To favor opposing sides."