The definition for illuminate is "To make clear." Used in a sentence: Her excellent lecture illuminated the complicated subject of nuclear physics. The definition for perception is "capacity for seeing or understanding.", the definition for extant is "Currently existing.", and the definition for compulsion is "An irresistible impulse."

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 inviolable is "secure from assault of trespass.", the definition for manifest is "Obvious.", and the definition for serenity is "Calmness."

The definition for corroborate is "To support with evidence." Used in a sentence: "Unless you can corroborate your story, it will not be admissible in court," the attorney told his client. The definition for stern is "harsh, severe.", the definition for aerate is "To supply with air.", and the definition for camaraderie is "Spirit of friendship."

The definition for flaw is "An imperfection." Used in a sentence: The otherwise perfect diamond had a tiny flaw that reduced its value. The definition for flourish is "to make bold, sweeping gestures.", the definition for archaic is "Characteristic of an earlier time.", and the definition for appraise is "To evaluate the worth of."

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 trove is "valuable collection.", the definition for gruff is "Rough or stern in manner or speech.", and the definition for derivative is "Lacking originality."