To interpolate, interpose. Obsolete.

transitive. To stuff in between.

transitive. = intex, v.; transferred to work in, to incorporate in the text.

To put (something) improperly into some position; to insinuate (quot. 1574); esp. in thrust in, to introduce irrelevantly, interpolate.

To introduce (words or passages) into a pre-existing writing; esp. to insert (spurious matter) in a genuine work without note or warning.

To insert, interpolate, or sandwich (a phrase, sentence, etc.). Const. in or into.