transitive verb.
To fix in the mind; instill.
transitive verb.
To insert (a morphological element) into the body of a word.
noun.
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.