IPA: //sʌbˈtrɛʒ.əri//
KK: /sʌbˈtrɛʒ.əri/
A smaller or secondary treasury where funds are kept or managed.
The government established a subtreasury to handle local financial transactions more efficiently.
Subtreasury → It is formed from "sub-" (meaning under) and "treasury" (from Latin "thesaurus", meaning storehouse or treasure). The word refers to a financial institution that operates under the main treasury, managing funds and resources.
Think of something that is 'under' ('sub-') the main 'storehouse' ('treasury') of funds — that's what a subtreasury is.