From Wiktionary, the free dictionary
From mw- + -asi (“to rebel”).
mwasi class I (plural waasi class II)
- rebel
18th century, Abdallah bin Ali bin Nasir, Al-Inkishafi[1], stanza 13:اَوُرَكِيْبُوُ جُوَ نِمَاسِ ، كَكُلَ خَسَرَ اُخَسِرِيِ- Aurakibuo jua ni-mwasi, kwa-kula khasara ukhasiriye.
- The one who rides it, know you are a rebel; you harm yourself.