IPA: /ˈʌndərˌbɔs/
KK: /ˈʌndərˌbɔs/
A person who is second in command in a criminal organization, assisting the leader and often managing operations.
The underboss was responsible for overseeing the day-to-day activities of the gang.
Underboss → It is formed from "under" (from Old English "under", meaning beneath or lower) and "boss" (from Dutch "baas", meaning master or chief). The word "underboss" refers to a subordinate leader or second-in-command beneath a higher authority.
Think of someone who is a 'master' ('boss') but is 'beneath' ('under') the main leader — that's what an underboss is.