What is the meaning behind the word star?
A shape representing or based on that of a star as seen in the night sky, usually having five or more triangular points radiating from a center.
Surprisingly, yes. The word is Latin, but its elements were borrowed from Greek. Dis- means bad, unfavorable, negative (eg. displeasure) -aster comes from the greek word άστρον (transliterated astron, pronounced ass-tron) which means a star. Literally the word means unfavorable star influence, and it gradually evolved to its modern meaning. The Greeks used (and still use) another word for it: catastrophe.