1. INGENUITY(NOUN): Cleverness

Synonyms: ability, brilliance     

Antonyms: clumsiness, ignorance

Example Sentence:

 

As per my view, this task is difficult and may require some ingenuity.

2. SWIRL(VERB): Spin around

Synonyms: churn, roil        

Antonyms: straighten, uncoil

Example Sentence:

The leaves were swirled along the ground by the wind.

3. UNLETTERED(ADJECTIVE): Uneducated

Synonyms: ignorant, illiterate            

Antonyms: educated, literate

Example Sentence:

Such misconceptions have not been confined to the unlettered masses.

4. SPRIGHTLY(ADJECTIVE): Full of vigor

Synonyms: agile, active     

Antonyms: spiritless, lethargic

Example Sentence:

The sprightly old woman walks two miles every day.

5. SANCTIMONIOUS(ADJECTIVE): Self-righteous

Synonyms: insincere, hypocritical   

Antonyms:  honest, sincere

Example Sentence:

His sanctimonious expressions explained his intentions.

6. CIRCUMSCRIBE(VERB): To form or mark the limits of

Synonyms: confine, define     

Antonyms: free, release

                        

Example Sentence:

The hedge circumscribes the property.

7. VICISSITUDES(NOUN): Change

Synonyms: fluctuation, permutation             

Antonyms: similarity, stability

Example Sentence: 

The vicissitudes of life produced the strongest contrasts of fortune.

8. OBSTREPEROUS(ADJECTIVE): Noisy

Synonyms: blusterous, boisterous      

Antonyms: moderate, calm

Example Sentence:

The class teacher ejected the obstreperous student out of the class.

9. SULLEN(ADJECTIVE):  Morose

Synonyms: gloomy, brooding          

Antonyms:  cheerful, pleasant

Example Sentence:

The offenders lapsed into a sullen silence.

10. CHAOTIC(ADJECTIVE): Disordered

Synonyms: uncontrolled, lawless     

Antonyms: ordered, organized

Example Sentence:

My house becomes a chaotic place in the absence of my wife.