The word "radiant" comes from Latin roots that mean to send out rays. Think of X-rays. Such technology is so named precisely because these devices use waves or "rays" to detect bone (and other) structures in your body. There can be "rays of sun," meaning the sunlight itself, shining. Thus, when we say that something is "radiant," we mean that it is shining. This word can be used metaphorically meaning joyful, as we say something like, "He was radiant when his mother told him that he would have his favorite dessert that that night."

"Fragile" is the best synonym of "delicate," as they both mean easily breakable, while the rest of the answers bear little relation to the word in question: "durable" means longlasting and "sturdy" has a similar meaning, while "contentious" means producing controversy or debate.

Because of the obvious root home, it is easy to think that "homely" means warm and welcoming (like "homey"). Be careful not to make this common mistake—"homely" does derive from "home," but it has traveled from there through the sense of plain and unadorned to our modern meaning of plain and unattractive. Be careful also not to confuse "homely" with "homily," which means a sermon.

"Robust" is an adjective that means "physically strong; muscular." So, "weak" cannot be the correct answer because "weak" is an antonym of "robust," and while "lithe" may look potentially correct, "lithe" means "thin, supple, and graceful," and is often used to describe a person's body. The closest synonym to "robust" amongst the possible answer choices is "burly," an adjective that means "large and strong; heavily built" and is used to describe people. So, "burly" is the correct answer.

"Lithe" is an adjective that refers to someone who is "flexible and supple, able to move the body lightly and gracefully." Even though "lithe" sounds like "length," long does not imply grace or agility, so that's not correct. Awkward and precarious are antonyms, and gentle describes how someone behaves, not a quality of their body. Therefore, the closest answer is "agile."

If something is ornate, it means that it is decorative or detailed. An example of this is there may be an ornate artistic design that an artist chooses to use in a painting.

Whenever we deceive someone, we trick or lie to him or her. Thus, something that is "deceptive" is something that we could call "tricky." A deceptive person is someone who manipulates with lies. A deceptive appearance is something that looks one way, though it really is not in fact that way. For example, a building might look deceptively tall when it is, in fact, quite short. Thus, it creates an illusion. This is why "illusory" is a good synonym for "deceptive."

“Obscure” means hidden or esoteric, so "hidden" is the correct answer. Something that is “obvious” is easy to know and understand; “coherent” means able to be understood; “abrupt” means happening quickly and suddenly without any forewarning; and “acceptable” means good enough.

"Tepid" is an adjective that can mean either "showing little enthusiasm" or "only slightly warm," especially when referring to liquids. Neither "loud" nor "boisterous" can't be the correct answer because they are each opposites of "showing little enthusiasm," but "lukewarm" is used of liquids or foods that should be hot and means "only moderately warm." So, because "lukewarm" is synonymous with the second meaning of "tepid," "lukewarm" is the correct answer.

"Coarse" means rough and can be used to describe the roughness of an object, the roughness of someone’s character, or the roughness of someone’s manners. When used to describe people, it generally means rude and uncouth. So, "rough" is the correct answer.