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 inviolable is "secure from assault of trespass.", the definition for abate is "Become less in amount or intensity.", and the definition for periodic is "Occurring at regular intervals."

The definition for oblivious is "Lacking awareness." Used in a sentence: Love–struck Charlie was oblivious to everyone but the object of his affection. The definition for inviolable is "secure from assault of trespass.", the definition for derelict is "Abandoned.", and the definition for retroactive is "effective as of a prior time or condition."

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 revoke is "to cancel by taking back.", the definition for implement is "To carry out or accomplish.", and the definition for recrimination is "A retaliatory accusation."

The definition for heed is "To pay attention to." Used in a sentence: "Heed my advice," the fortuneteller warned Sebastian when he tried to ignore her prophecy. The definition for diffident is "lacking self–confidence.", the definition for immoderate is "Beyond usual or proper limits.", and the definition for periodic is "Occurring at regular intervals."

The definition for finite is "Having definite limits." Used in a sentence: The exasperated mother had finite patience for her toddler's tantrums. The definition for corroborate is "to support with evidence.", the definition for serenity is "Calmness.", and the definition for comprehensible is "Understandable."