-agogue

1.
a combining form with the meaning “leader, bringer,” of that named by the initial element, occurring in loanwords from Greek (demagogue; pedagogue); used also in medical terms that denote substances inducing the expulsion or secretion of that named by the initial element (cholagogue; hemagogue).
Also, -agog.
Origin
< Greek -agōgos, -ē, -on, akin to ágein to lead, cognate with Latin agere to lead, drive, Old Norse aka to carry, convey
British Dictionary definitions for -agogue

-agogue

combining form
1.
indicating a person or thing that leads or incites to action: pedagogue, demagogue
2.
denoting a substance that stimulates the secretion of something: galactagogue
Derived Forms
-agogic, combining_form:in_adjective
-agogy, combining_form:in_noun:countable
Word Origin
via Late Latin from Greek agōgos leading, from agein to lead
-agogue in Medicine

-agogue or -agog
suff.
A substance that stimulates the flow of: hemagogue.