Circumfix

A circumfix (abbr: circ) (also parafix, confix, or ambifix) is an affix which has two parts, one placed at the start of a word, and the other at the end. Circumfixes contrast with prefixes, attached to the beginnings of words; suffixes, attached at the end; and infixes, inserted in the middle. Circumfixes are common in Malay and Georgian.

Its related operation is called circumfixation (or parafixation, confixation, ambifixation).