IPA: /ˌɛm.əˈnæɡ/
KK: /ˈɛmənəˌɡɔɡ/
A substance that helps to start or increase menstrual bleeding.
The doctor prescribed an emmenagogue to help regulate her menstrual cycle.
Emmenagogue is formed from "emmen" (from Greek "emmenia", meaning month or menstruation) and "agogue" (from Greek "agōgos", meaning leading or inducing). The word refers to a substance that induces or leads to menstruation.
Think of something that 'leads to menstruation' — 'emmen' relates to the month or menstruation, and 'agogue' means to lead.