New words with synonyms and antonyms

Here are 10 new words with their synonyms and antonyms:

1. Perspicacious

Example sentence: "She was a perspicacious observer of human behavior and quickly picked up on the subtle cues."

2. Ennui

Example sentence: "After a few months of doing the same job, he started to feel ennui and was looking for a change."

3. Fastidious

Example sentence: "She was a fastidious editor who paid close attention to every detail in the manuscript."

4. Inscrutable

Example sentence: "The ancient hieroglyphics were inscrutable to most people, but the expert was able to decipher their meaning."

5. Lassitude

Example sentence: "After a long day of traveling, she felt lassitude and just wanted to collapse onto the bed."

6. Mercurial

Example sentence: "Her mercurial mood swings made it difficult for her friends to know what to expect from her."

7. Nefarious

Example sentence: "The nefarious activities of the corrupt politician were finally exposed to the public."

8. Obfuscate

Example sentence: "The lawyer's attempt to obfuscate the complex legal issue only made it more confusing for the jury."

9. Perfidious

Example sentence: "The company's perfidious actions towards its employees led to a major scandal."

10. Vigilant

Example sentence: "The vigilant security guard noticed the suspicious behavior and quickly alerted the authorities."

I hope these words and their synonyms and antonyms are helpful!