Gam-
Greek; marriage
gastr-
Greek; stomach
Ge-
German; perfective prefix used in German
Gen-
Latin; to create, birth
Geo-
Greek; earth
Glac-
Latin; ice
Gloss-/glott-
New Latin from Greek; tongue
Gnath-/-gnath
Greek; jaw
-gnomy
Greek; science, art
Gnos-/gnot-/gnom-/gnosy-
Greek; knowledge
Gon-
Greek; generating, producing
-gon
Greek; figure with angles
-gony
Greek; method of (re)production or generation
-gram
Greek; record
-graph
Greek; one writing
Grav-/gravi-
Latin; heavy
Gyn-/gynec-
Greek; woman
Gyr-
Greek; to turn