This is the 312th most frequent Arabic word.
سي
The Arabic word "سي" can mean "bad" or "poor" in certain contexts, often as part of phrases.
Here, "سيارتي" (sayarati) is a possessive form meaning "my car," with "سي" being a root element in the word "سيارة" (car).
هذه السيارة سيارتي الجديدة.
This car is my new car.
In this case, "سيّر" (sayara) is derived from the root "سي" and means "conducted, or managed," here showing an action involving guidance or operation.
لقد سيّر المدير الاجتماع بمهارة.
The manager conducted the meeting skillfully.
Here, "السياسة" (alsiyasa) refers to "politics," with "سي" being a root part that contributes to the meaning related to governance or policy.