Latin 'stella' (star) from PIE *h-ster gave us 'stellar,' 'constellation,' 'asteroid,' and 'disaster.'
A Latin word meaning 'star,' the source of English words relating to stars, constellations, and stellar phenomena, and still widely used as a personal name.
From Old Latin *stēlā, from Proto-Italic *stērelā, from the Proto-Indo-European root *h₂stḗr meaning 'star.' The Latin form underwent a change from *stērelā to stēlla through a process of assimilation (rl > ll). The PIE root produced cognates in nearly every branch of the family: Greek ἀστήρ (astḗr), Germanic *sternǭ (English 'star,' German 'Stern'), Sanskrit stṛ́ (tā́rā). The Latin form stēlla is the direct ancestor of the star-words in all the Romance languages. Key
English has two parallel star-word families from the same PIE root *h₂stḗr: the Latin branch through stella (giving 'stellar,' 'constellation,' 'interstellar') and the Greek branch through ἀστήρ (giving 'asteroid,' 'astronomy,' 'astrology,' 'astronaut,' 'disaster,' and 'asterisk'). The native Germanic branch gave 'star' itself. All three — 'star,' 'stellar,' and 'asteroid' — are ultimately the same word, separated by five thousand years