Mid 18th century. Either from classical Latin superfix-, past participial stem of superfīgere to fix on top of (from super- + fīgere), or from super- + fix.
Definition of superfix in US English:
superfix
verb
with objectTo fix on or attach to something else.
Origin
Mid 18th century. Either from classical Latin superfix-, past participial stem of superfīgere to fix on top of (from super- + fīgere), or from super- + fix.