Iconic (adj.): famously and distinctively representative of its type; widely recognized and well-established.
Atypical (adj.): not representative of a type, group, or class.
Peculiar (adj.): different to what is normal or expected; strange.
Eccentric (adj.): (of a person or their behaviour) unconventional and slightly strange.
Incognito (adj.): (of a person) having one's true identity concealed.
Quintessential (adj.): representing the most perfect or typical example of a quality or class.
So, the correct answer is option C.

The meanings of the words are:
Legacy: an amount of money or property left to someone in a will

Vehement: showing strong feeling; forceful, passionate, or intense.
Outspoken: frank in stating one's opinions, especially if they are shocking or controversial.
Vocal: relating to the human voice.
Braggart: Boastful
Silent: not making or accompanied by any sound.

Therefore, silent is the antonym of all the other words. Hence, option E is the correct answer.

Polarize (v.): to break up or divide into opposing factions or groupings.
Divide (v.): separate or be separated into groups.
Conquer (v.): overcome and take control of (a place or people) by military force.
Regulate (v.): control or maintain the rate or speed of (a machine or process) so that it operates properly.
Administer (v.): manage and be responsible for the running of (a business, organization, etc.).
Hustle (v.): push roughly.
So, the correct answer is option A.

Trope (n.): a common or overused theme or device.
Motif (n.): a dominant or recurring idea in an artistic work.
Epigram (n.): a pithy saying or remark expressing an idea in a clever and amusing way.
Nuance (n.): a subtle difference in or shade of meaning, expression, or sound.
Overtone (n.): a subtle or subsidiary quality, implication, or connotation.
Maxim (n.): a short, pithy statement expressing a general truth or rule of conduct.
So, the correct answer is option A.