infix
1. [ verb ] (grammar) attach a morpheme into a stem word
Related terms: affix
2. [ verb ] put or introduce into something
Synonyms: insert introduce enter
Examples:

"insert a picture into the text"

Related terms: attach implant plug_in input instill penetrate sandwich cannulate transplant cut-in insertion penetrate
3. [ noun ] (linguistics) an affix that is inserted inside the word
Related terms: affix
Similar spelling:   in_fact