The definition for diffident is "Lacking self–confidence." Used in a sentence: The diffident student never raised her hand in class, even when she knew the answer. The definition for gargantuan is "gigantic.", the definition for aesthete is "Person having or affecting sensitivity to beauty.", and the definition for stifle is "To repress or discourage."

The definition for combustion is "Act of burning." Used in a sentence: Campers must use fire with great caution to prevent combustion of the parched brush. The definition for awe is "emotion combining dread and wonder.", the definition for inauspicious is "Not favorable.", and the definition for incongruous is "Not harmonious, incompatible."

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 combative is "eager to fight.", the definition for censure is "To find fault with.", and the definition for fickle is "Lacking constancy, changeable."

The definition for straddle is "To favor opposing sides." Used in a sentence: Kia straddled the issue, not wanting to say whether James or Tara was right. The definition for heinous is "shockingly evil.", the definition for stifle is "To repress or discourage.", and the definition for advantageous is "Giving an advantage."

The definition for duplicity is "Deceptive thought, speech, or action." Used in a sentence: The life of an undercover detective is filed with necessary duplicity. The definition for stern is "harsh, severe.", the definition for punctual is "On time.", and the definition for placebo is "An inactive substance used in medical testing."