The definition for incumbent is "Necessary as a duty or responsibility." Used in a sentence: It was incumbent on Jack to attend his father's retirement party. The definition for exasperation is "the state of being irritated.", the definition for incongruous is "Not harmonious, incompatible.", and the definition for extol is "To praise highly."

The definition for induce is "To influence or cause." Used in a sentence: The loud blast of the cannon induced an avalanche. The definition for disconcert is "to throw into confusion.", the definition for lenient is "Mild or tolerant.", and the definition for awe is "Emotion combining dread and wonder."

The definition for demeanor is "Behavior towards others." Used in a sentence: Carlos was well liked because of his charming demeanor. The definition for authoritarian is "favoring absolute obedience to authority.", the definition for melodious is "Having a pleasing melody.", and the definition for eulogy is "Speech or writing in praise of deceased."

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 eloquent is "fluent, expressive.", the definition for belated is "Past the normal or proper time.", and the definition for compulsion is "An irresistible impulse."

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 salvage is "to save from ruin.", the definition for pathos is "Sympathetic pity.", and the definition for inviolable is "Secure from assault of trespass."