A “benefactor” is someone who supports a cause and contributes money to it. To provide further help, a “detractor” criticizes or takes away from a cause; a “narrator” is a storyteller; the “protagonist” is the hero of a story and the “antagonist” is the villain of the story.

A “benefactor” is someone who supports a cause and contributes money to it. To provide further help, a “detractor” criticizes or takes away from a cause; a “narrator” is a storyteller; the “protagonist” is the hero of a story and the “antagonist” is the villain of the story.

A “visionary” is someone who has the vision to see creative solutions to problems, a creative thinker. To provide further help, “uncontrollable” means not able to be controlled; “potent” means powerful; a “portent” is an omen.

A “visionary” is someone who has the vision to see creative solutions to problems, a creative thinker. To provide further help, “uncontrollable” means not able to be controlled; “potent” means powerful; a “portent” is an omen.

Your “nemesis” is your enemy, so "enemy" is the correct answer. To provide further help, an “ally” is someone who is on your side or a friend, an “accomplice” is someone who works with you, usually on a risky or nefarious mission, “protagonist” means hero, and “antagonist” means villain. “Nemesis” is an antonym of “ally” and “accomplice.” Likewise, “protagonist” is an antonym of “antagonist.”

An “antibiotic” is a substance that kills bacteria and so is used as medicine. The prefix "anti_-_" means against or negating something, and the suffix "-biotic" means having to do with life, in this case, bacteria. Along with “viruses,” “bacteria” are the primary agents by which disease is spread. However, it is worth nothing that there are a great many number of bacteria in our bodies that help us a great deal.

The "onset" of something is its start or its beginning, so "start" is the correct answer. None of the other answer choices are close in meaning to "onset": a "sample" is a small amount of something having the characteristics of larger amounts or the whole thing; "discovery" is the act of finding out something new; a "riot" is a violent demonstration or protest; and a "setting" can mean the time period and location in which a story takes place.

A "nemesis" is an opponent or rival, a person or group with which you are especially competitive. For example, pretend that your school football team often plays against another team. You and your friends get excited for those games, especially hate when your team loses, and might even talk about the opposing team members as enemies. The opposing team would be your nemesis. Of the other choices, an "acquaintance" is someone that you know, a "relative" is a family member or someone to whom you are related, and a "namesake" is a thing that shares its name with something else, or is directly named after it.

A "guardian" is another name for someone who looks after someone else or a protector. To help you, a "student" is someone who goes to school.

A felon is someone who has committed a crime. To further help you, a politician is someone who is involved in government; a miser is someone who hates spending money and tries to save as much as possible.