"Cool" and "freshen" are synonyms. The other words are not synonymous with "cool."

A cat may "pounce" on a mouse. This means that it suddenly springs on the mouse, usually from a hiding place. The word with the closest meaning is "ambush."  An "ambush" is a surprise attack.

All of the other words on the list are also ways of moving. If you "fly," you move through the air. If you "crawl," you drag your body or move on your hands and knees. "Glide" is a form of flying where you move through the air without an engine or moving wings. "Wriggle" means to twist and turn quickly on the ground.

Birds fly; babies crawl; kites glide; and worms wriggle.

"Sustain" most nearly means to strengthen or support. Variations include "sustainable" or "sustenance." "Deny" and "object" both mean to oppose, and therefore are not synonyms. "Confuse" and "complicate" both relate to making a situation more complex, and are not related to "sustain."

"Looking" means to peer at something, which makes "peering" the best synonym of "looking."

Incorrect Answers:

"Hyperventilating" involves becoming overexcited. 

"Trotting" involves running at a moderate pace.

"Meeting" means to make the acquaintance of someone for the first time.

"Feeling" involves experiencing an emotion.

The word worried can replace concern to maintain a similar meaning. 

"Astonish" means to surprise, so "surprise" is the correct answer. None of the other answer choices are close in meaning to "astonish": "demand" means to ask for something forcefully; "susceptible" means in danger; "manage" means direct a group or endure; and "punish" means discipline for breaking rules or behaving badly.

"Assuage" means to calm someone or something down, so "calm," which when used as a verb means make calm, is the correct answer. To help you, "depict" means to show, "embolden" means to make brave, "demand" means forcefully ask for something, and "zoom" means to travel at a very fast speed.

The answer is "despise." "Despise" and "loathe" are verbs that mean dislike strongly, such as in the sentence, "He despises people who bully others."

To "sedate" something means to use medicine to make it sleep, to calm it, or settle it down. So, "settle down" is the correct answer. To help you, "scold" means reprimand, and "deny" means refuse to accept something.

To “grimace” is to express sadness or anger or pain with your face, and as such, it is closest in meaning to “scowl,” which means frown to convey great sadness or anger. To provide further help, to “chuckle” is to laugh quietly; to "grin" is to smile broadly, to "whisper" is to speak in a low, quiet voice so as not to be heard, and to “demand” is to tell someone they have to do something as if they don't have a choice.