To insert anything somewhere (especially between other things), such as an affix into a word. (Compare interpolate.)
Substantiivit
(often used attributively) An atom or molecule, or a substance, that enters between the layers of the crystal lattice of another substance, especially that of graphite.
A compound formed by foreign atoms or molecules entering between the layers of a crystal lattice, especially that of graphite.
Esimerkit
'[T]is wonderful where or when we ever got anything of this which we call wisdom, poetry, virtue. We never got it on any dated calendar day. Some heavenly days must have been intercalated somewhere.