IPA: //ˌdɛsɛmˈvaɪrəl//
KK: /dɛˈsɛmˌvaɪrəl/
Relating to a group of ten officials in ancient Rome known as decemvirs.
The decemviral council was responsible for creating laws in ancient Rome.
Decemviral is formed from "decem" (meaning ten) and "vir" (meaning man). The term refers to a group of ten men, specifically in the context of ancient Roman governance, where a decemvir was one of a board of ten officials.
Think of 'decem' meaning ten and 'vir' meaning man — a decemviral group is made up of ten men.
No commonly confused words.