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
Stevan	-	Serbian, Croatian
Liz	['liz]
Yaroslava	yah-rah-SLAH-vah (Russian)	Russian, Ukrainian, Medieval Slavic
Pete	PEET	English
Zdravko	-	Croatian, Serbian, Slovene, Bulgarian, Macedonian
SalİH	-	Turkish