words of one syllable

Very simple words; terms that are easy to understand. You're an astrophysicist and I'm not, so please, explain this concept in words of one syllable so I might have a chance of understanding it!

Common Names:

Name	Pronounced	Usage
AdÉLa	-	Czech
Silvia	['silviə]
Britney	BRIT-nee	English (Modern)
Wischard	-	Old Norman
Cassius	KASH-əs (English), KAS-ee-əs (English)	Ancient Roman, English
Suhail	-	Arabic, Urdu