genio-, geni-, geny-

(Greek: chin, jaw, cheek)

genial
geniocheiloplasty
genioglossal (adjective), more genioglossal, most genioglossal
Referring to, or relating to, the chin and tongue.
genioglossus (s), genioglassi (pl)
A genioglossus muscle, or an extrinsic muscle of the tongue, arising from the superior mental spine (slight projection) of the mandible (jaw bone) and which depresses and protrudes the tongue.
geniohyoid
genion
geniophobia (s) (noun) (no plural)
An excessive fear of chins: Kate, suffering from geniophobia, dreaded the looks of other people and seeing the protruding parts of their lower jaws, especially if they were imperfect, somehow injured, too prominent, or even when they looked deformed or hideous.
genioplasty