The definition for placebo is "An inactive substance used in medical testing." Used in a sentence: Tom, who had taken the placebo, found that his allergy symptoms did not go away. The definition for compulsion is "an irresistible impulse.", the definition for mandate is "An official order or commission to do something.", and the definition for opportune is "Suitable or convenient."

The definition for elate is "To fill with joy." Used in a sentence: It elated Margaret to be awarded first place in the science fair. The definition for anthology is "a collection of selected literary pieces.", the definition for dubious is "Questionable.", and the definition for salvage is "To save from ruin."

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 meticulous is "extrememly careful regarding details.", the definition for equitable is "Fair and equal.", and the definition for appalling is "Inspiring dismay or disgust."

The definition for opportune is "Suitable or convenient." Used in a sentence: Quan stepped onto the platform at the most opportune time, just as the train pulled in. The definition for serenity is "calmness.", the definition for aerate is "To supply with air.", and the definition for fragile is "Delicate."

The definition for stern is "Harsh, severe." Used in a sentence: The stern principal canceled the prom after the seniors played a silly prank. The definition for corrective is "intended to correct.", the definition for inviolable is "Secure from assault of trespass.", and the definition for implausible is "Unbelievable."