User: give me 40 unfamiliar English word and its definitions
Assistant: Sure! Here are 40 unfamiliar English words along with their definitions:

1. **Acrimonious** - Bitter and argumentative, especially in speech or debate.
2. **Bucolic** - Relating to the pleasant aspects of the countryside and country life.
3. **Cacophony** - A harsh, discordant mixture of sounds.
4. **Defenestration** - The act of throwing someone or something out of a window.
5. **Ebullient** - Cheerful and full of energy.
6. **Fractious** - Irritable and quarrelsome.
7. **Garrulous** - Excessively talkative, especially on trivial matters.
8. **Harangue** - A lengthy and aggressive speech or lecture.
9. **Insouciant** - Showing a casual lack of concern; indifferent.
10. **Juxtaposition** - The act of placing two or more things side by side to compare or contrast them.
11. **Kismet** - Destiny; fate.
12. **Lugubrious** - Looking or sounding sad and dismal.
13. **Mellifluous** - (Of a voice or words) Sweet or musical; pleasant to hear.
14. **Nefarious** - Wicked or criminal.
15. **Obfuscate** - To deliberately confuse or make unclear.
16. **Pernicious** - Having a harmful effect, especially in a gradual or subtle way.
17. **Quixotic** - Romantic and idealistic to the point of being impractical.
18. **Recalcitrant** - Stubbornly resistant to authority or control.
19. **Sagacious** - Having or showing keen mental discernment and good judgment; wise.
20. **Trepidation** - A feeling of fear or agitation about something that may happen.
21. **Ubiquitous** - Present, appearing, or found everywhere.
22. **Vicarious** - Experienced in the imagination through the feelings or actions of another person.
23. **Winsome** - Attractive or appealing in a fresh, innocent way.
24. **Yen** - A strong desire or craving.
25. **Zeitgeist** - The defining spirit or mood of a particular period of history as shown by the ideas and beliefs of the time.
26. **Aplomb** - Self-confidence or assurance, especially when in a demanding situation.
27. **Banal** - So lacking in originality as to be obvious and boring.
28. **Chimerical** - Existing only as the product of unchecked imagination; fantastically visionary or improbable.
29. **Disenfranchise** - To deprive someone of the right to vote or other rights.
30. **Ephemeral** - Lasting for a very short time.
31. **Farrago** - A confused mixture; a haphazard assortment.
32. **Galvanize** - To shock or excite someone into taking action.
33. **Hapless** - Unfortunate or unlucky.
34. **Ineffable** - Too great or extreme to be expressed in words; indescribable.
35. **Juvenile** - Related to or characteristic of young people; a young person.
36. **Kaleidoscope** - A constantly changing pattern or sequence of elements.
37. **Lethargic** - Affected by lethargy; sluggish and apathetic.
38. **Misanthrope** - A person who dislikes humankind and avoids human society.
39. **Nostalgia** - A sentimental longing or wistful affection for the past.
40. **Obsequious** - Obedient or attentive to an excessive or servile degree.

Feel free to ask if you need more examples or further clarification on any of these words!
User: give me 10 unfamiliar words about perseverance and resilience
Assistant: