Group#5-The 5 hardest English words are.....

This topic is the hardest.But I have do some researches.
So this is my answer.
1.Onomatopoeia: I choose this word because I like poem a lot .
Onomatopoeia is a word that imitates or suggest the source of the
sound that it describe.
2.Untranslatability:Is a property of a text.Who can give the example?
3. Serendipity: Accident are not always that bad.This word mean
happy accident or pleasant surprise.
4. Particular:exceptional degree,especially
5. Necessarily: As a matter of compulsion or requirement.

Well that's all thanks for reading.:D