The Latin root -vac- means empty, without, as in "vacant" which means empty, not occupied. So, "evacuate" means to remove people from an area, to make an area empty. To provide additional help, "insert" means add to and the other three answer choices are all synonyms they all mean to hint at or propose an idea. 

The Latin root -pon- means put, so "postpone" means to put off until later, to delay. Additionally, "detect" means notice, observe the presence of; "vanish" means disappear; "scold" means tell off, punish. 

The latin root -pugn- means fight, so "pugnacious" means aggressive, combative, quick to anger, hostile. To provide additional help, "callous" means harsh and uncaring; "reprehensible" means behavior that is disgraceful, deserving of harsh criticism; "cooperative" means helpful, willing to work with others; "squalid" means dirty, filthy, poor and wretched. 

The Latin roots -noun- and -nunc- mean declare, speak about, as in "denounce," which means to speak out against something, to declare something is wrong or malevolent. So, "announce" means to publicly declare. Additionally, "reprise" means repeat a performance of, repeat a character; "concentrate" means focus on; "possess" means have, own; "suffer" means experience pain. 

The Latin root -dur- means tough, hard, lasting, as in "durable," which means able to withstand pressure, long lasting, tough. So, "enduring" means lasting or continuing. Additionally, "halting" means pausing, stopping; "completing" means finishing. 

In the word "malodorous" there are two relevant Latin roots. The first mal- means bad, as in "malevolent," which means bad natured, evil, wicked. The second is -odor- which means related to smell or scent. So, "malodorous" means smelly, unpleasantly smelling, disgusting, stinky, fetid. 

The Latin root -vinc- means conquer, win, as in "victory." So, "invincible" means unable to be conquered, indestructible, unbeatable. Additionally, "impassive" means not showing or feeling emotions. 

The Latin root -numer- means number, as in "numerous" which means a large number of something. So, to "enumerate" means to make a numbered list of something. Additionally, "repel" means force back, fight off; "compel" means force to do something.

The word "deride" comes from the Latin word for to laugh. Whenever we "ridicule" someone, we mock that person or "laugh at them." In a way, you can think of the expression "being a laughing stock." This means that someone is being ridiculed or derided. When we "deride" someone, we mock that person. Mockery is a mean way of "making fun of" someone. (Do you see that the word "deride" has a form similar to "ridicule"? Both words come from the Latin "ridere," meaning to laugh.) 

The word "luminous" is related to the word "illuminate." They both come from Latin roots meaning light. Whenever we "illuminate" a room, we add light to it. Something that is "luminous" is shining or bright. The word "brilliant" is often used to mean very intelligent; however, this comes from the idea that such a person has a "very bright or shining mind." It is a bit metaphorical. The word "brilliant" means to shine, and this is a good synonym for "luminous."