The story
- Mandarin · derived from宰相“grand chancellor”
- Written Oirat · derived fromᠴᠠᠶᡅᠰᠠᡊ
- cmg · derived fromᠵᠠᠶᠢᠰᠠᠩ
- Mongolian · borrowed fromзайсан
- English todayzaisan
Borrowed from Mongolian зайсан (zaisan), Classical Mongolian ᠵᠠᠶᠢᠰᠠᠩ (ǰayisang) and Written Oirat ᠴᠠᠶᡅᠰᠠᡊ (zaᠶisang), themselves from Mandarin 宰相 (zǎixiàng, “grand chancellor”).
Etymology from Wiktionary, CC BY-SA 4.0.