diff --git a/glossary.tex b/glossary.tex
index e9d3608a77514bec977c1b0cbb19af96ab08bc8a..d431ad8881acb69fb22688e70bd2617e56988654 100644
--- a/glossary.tex
+++ b/glossary.tex
@@ -865,6 +865,14 @@ Fewer monsters wander through them, because fewer plants grow there},
   Predators larger than a horse hunt deer and people in the same way, so everyone travels together, and well-armed},
 }
 
+\longnewglossaryentry{tradeTongue}{
+  name={The Trade Tongue},
+  text={Trade Tongue},
+  description={lets people trade, despite not sharing much of a common language.
+  It has about two hundred words, so people have to indicate what they want to say by lumping words together.
+  E.g. `cow' might be `white-water animal', and cheese could be `rock of white-water animal'},
+}
+
 \newacronym[
   description={is the universal way to measure time in \glsentrytext{fenestra}, where one \glsentrytext{cycle} equals three `years'},
   name={Gnomish Machine Time (GMT)},