Infixes require a special boundary symbol in order to insure that the root bisected by them is perceived as a unit. This is achieved by enclosing them in angled brackets as shown in and .

The Indonesian agent nominalizer is inserted after the syllable onset; the Latin present stem formative is inserted before the coda.

Rule 18. An infix is enclosed in angled brackets both in T and in the gloss.
The gloss of a left-peripheral infix precedes the gloss of its host, the gloss of a right-peripheral infix follows it.