The definition for comparable is "Similar, equivalent." Used in a sentence: Helen will only accept something of comparable value for her ticket to the concert. The definition for placebo is "an inactive substance used in medical testing.", the definition for combustion is "Act of burning.", and the definition for repentant is "Feeling regret."

The definition for compulsion is "An irresistible impulse." Used in a sentence: Tamar, a shoe fanatic, could not resist the compulsion to buy the shiny red boots. The definition for ploy is "a contrived plan.", the definition for heinous is "Shockingly evil.", and the definition for extol is "To praise highly."

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 commemorate is "to mark by a ceremony.", the definition for advantageous is "Giving an advantage.", and the definition for solace is "Source of consolation."

The definition for futile is "Without purpose, completely ineffective." Used in a sentence: Arguing with Andrew is futile because he never changes his mind. The definition for implement is "to carry out or accomplish.", the definition for eloquent is "Fluent, expressive.", and the definition for belated is "Past the normal or proper time."

The definition for lurid is "Causing horror, shocking." Used in a sentence: The lurid photos of the crime scene upset the jury. The definition for rehash is "to discuss again.", the definition for drab is "Dull, monotonous.", and the definition for foil is "One that enhances or underscores by contrast."