"Challenging" means the same thing as "difficult"; both words mean not easily accomplished. So, "challenging" and "difficult" are synonyms, and to solve the analogy, you need to pick out the answer choice that is a synonym of "sad." "Downhearted" means sad, so "downhearted" is the correct answer. None of the other answer choices are close in meaning to "sad": "gleeful" means full of glee or happy; "frustrated" means angry or annoyed; "worried" means concerned or apprehensive; and "fearful" means afraid.

"Proceed" means the same thing as "continue," so the two words are synonyms. Both words mean to keep going in the same direction. So, to solve this analogy, you need to find the best synonym of "respond." To "respond" means to reply or answer, so "answer" is the correct answer. To help you, "display" and "exhibit" both mean show or present something, and "defy" means to not listen to someone in charge and do something they do not want you to do.

If you "despise" someone or something, you hate that person or thing, so "despise" and "hate" are synonyms of one another. So, that means that to solve the analogy, you need to pick out the answer choice that is the best synonym of "revere." "Revere" means respect, so "respect" is the correct answer. "Revere" means respect, so "respect" is the correct answer. To help you, "supplant" means replace, "suspect" means believe someone to be guilty, and "remedy" means fix.

"Persistent" and "relentless" both mean not stopping even when something becomes difficult or people try to dissuade you, so the two words are synonyms of one another. So, to solve the analogy, you need to pick out an answer choice that means the same thing as "adequate." "Adequate" means good enough, so the best available synonym of "adequate" is "acceptable," which also means good enough. To help you, "furious" means very angry and "enamored" means in love with.

"Thankful" is a synonym of "grateful" because the two words both mean appreciative or relieved. So, to solve the analogy, you need to pick out an answer choice that means the same thing as "envious." "Envious" means desiring a thing or quality that someone else has that you don't, so the correct answer is "jealous," which also means desiring a thing or quality that someone else has that you don't. To help you, "humorous" means funny, and someone who is "guilty" feels bad about something they did.

Complete can be used as a verb that means finish or an adjective that means finished. So, "complete" and "finish" are synonyms of one another. To solve this analogy, you have to figure out the word that is the closest synonym of "start." "Start" means begin, so the correct answer is “begin.” To help you, "terminate" means finish, "hear" means listen to the sounds that something or someone is making and "observe" means watch.

"Part" means a piece of something, so "part" and "piece" are synonyms. So, to solve this analogy, you have to figure out the best synonym of "terror." "Terror" means great fear, so "fear" is the correct answer. 

"Attractive" means pretty, so "attractive" and "pretty" are synonyms. So, to solve this analogy, you have to figure out the best synonym of "tidy." "Tidy" means clean and neat, so the correct answer is “neat.”

To "blend" something means to mix it together with something else, so "blend" and "mix" are synonyms of one another. So, to solve the analogy, you need to pick out the best available synonym of "coax." "Coax" means encourage, so “encourage” is the correct answer. To help you, "supplant" means replace, to "assist" means to help, and "supplement" means add on to.

"Strange" and "peculiar" are words that each mean abnormal or weird, so they are synonyms. So, to solve the analogy, you have to pick out an answer choice that is closest in meaning to "furious." "Furious" means extremely angry, so "angry" is the correct answer.