infix

To fix in the mind; instill.

To insert (a morphological element) into the body of a word.

An inflectional or derivational element appearing in the body of a word. For example, in Tagalog, the active verb sulat, “write,” can be converted to a passive, “written,” by inserting the infix –in–, yielding sinulat.

Something infixed; in grammar, an element having the value of a suffix or a prefix, but inserted in the body of a word, as practised in some languages.

To fix or fasten in; insert forcibly; implant firmly: as. to infix a dart; to infix facts in the memory.