What it means
سیاره (sayyâre) is the Persian word for planet. It is an Arabic loanword, derived from the root س-ی-ر (s-y-r), which carries the meaning of traveling or journeying. The classical Arabic form سَيَّارَة (sayyâra) means a traveler or wanderer, which is exactly how ancient astronomers understood planets: moving lights that wandered across the fixed backdrop of stars. The word entered Persian through centuries of contact with Arabic scientific literature. A close synonym is none: sayyâre is the only standard word for planet in both formal and spoken Persian.
How to use it
- مریخ یه سیارهی سرخه. (merikh ye sayyâre-ye sorkhe.) “Mars is a red planet.”
- منظومهی شمسی هشت تا سیاره داره. (manzume-ye shamsi hasht tâ sayyâre dâre.) “The solar system has eight planets.”
- زمین هم یه سیارهست. (zamin ham ye sayyârest.) “Earth is also a planet.”
- کدوم سیاره رو دوست داری؟ (kudum sayyâre ro dust dâri?) “Which planet do you like?”
Cultural note
Medieval Iranian astronomers, including al-Biruni and Ibn Sina, wrote major works in Arabic that shaped how planetary motion was understood across the Islamic world and into Europe. The term sayyâre reflects that scholarly tradition: the planets were defined by their motion, not their brightness or size. Today the word is fully naturalized in Persian and appears in school science classes, news about space missions, and casual conversation equally. There is no pure Persian alternative in common use for this word, which marks how deeply Arabic scientific vocabulary took root in the language during the Islamic Golden Age.