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 dubious is "questionable.", the definition for parity is "Equality.", and the definition for compulsion is "An irresistible impulse."

The definition for onset is "Beginning." Used in a sentence: Crocuses bloom at the onset of spring, sometimes even before the snow melts. The definition for turmoil is "extreme confusion, agitation.", the definition for catastrophic is "Relating to extreme misfortune.", and the definition for pretense is "False intention or purpose."

The definition for disconcert is "To throw into confusion." Used in a sentence: Jennifer's outspoken criticism of the meal disoncerted the waiter. The definition for incongruous is "not harmonious, incompatible.", the definition for rancorous is "Marked by deep ill–will.", and the definition for extenuating is "Partially excusing."

The definition for equitable is "Fair and equal." Used in a sentence: The judge made an equitable decision dividing the estate evenly among the sisters. The definition for prudent is "marked by wisdom, shrewd.", the definition for prominence is "Importance.", and the definition for gruff is "Rough or stern in manner or speech."

The definition for cunning is "Showing clever insight." Used in a sentence: The general devised a cunning strategy to outfox the enemy. The definition for incongruous is "not harmonious, incompatible.", the definition for placebo is "An inactive substance used in medical testing.", and the definition for censure is "To find fault with."