The definition for gruff is "Rough or stern in manner or speech." Used in a sentence: Heidi's grandfather was gruff, barking stern orders and hardly smiling. The definition for pretense is "false intention or purpose.", the definition for comprehensible is "Understandable.", and the definition for trove is "Valuable collection."

The definition for implausible is "Unbelievable." Used in a sentence: Claudia's implausible excuse failed to convince her teacher. The definition for ploy is "a contrived plan.", the definition for obnoxious is "Highly offensive.", and the definition for opportune is "Suitable or convenient."

The definition for untenable is "Not able to be defended." Used in a sentence: Rashid made the untenable statement that George Washington was the second president of the United States. The definition for corrective is "intended to correct.", the definition for serenity is "Calmness.", and the definition for fickle is "Lacking constancy, changeable."

The definition for regale is "To amuse." Used in a sentence: My clever brother Jeffrey regaled the dinner guests with tales of his adventures. The definition for oblivious is "lacking awareness.", the definition for lenient is "Mild or tolerant.", and the definition for untenable is "Not able to be defended."

The definition for immoderate is "Beyond usual or proper limits." Used in a sentence: Bob's immoderate appetite shocked the guests at the wedding banquet. The definition for penurious is "extrememly stingy.", the definition for stifle is "To repress or discourage.", and the definition for punctual is "On time."