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 heinous is "shockingly evil.", the definition for incisive is "Impressively direct and decisive.", and the definition for combative is "Eager to fight."

The definition for servile is "Fearfully submissive." Used in a sentence: Felicia's servile attitude annoyed her boss, who preferred an assistant with more backbone. The definition for heed is "to pay attention to.", the definition for placebo is "An inactive substance used in medical testing.", and the definition for combative is "Eager to fight."

The definition for opportune is "Suitable or convenient." Used in a sentence: Quan stepped onto the platform at the most opportune time, just as the train pulled in. The definition for onset is "beginning.", the definition for sociable is "Inclined to seek companionship.", and the definition for civility is "Politeness."

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 demeanor is "behavior towards others.", the definition for equitable is "Fair and equal.", and the definition for eulogy is "Speech or writing in praise of deceased."

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 immoderate is "beyond usual or proper limits.", the definition for augment is "To make greater.", and the definition for serenity is "Calmness."