in·ter·lard 
(ĭn′tər-lärd)
(ĭn′tər-lärd)tr.v. in·ter·lard·ed, in·ter·lard·ing, in·ter·lards
To insert something foreign into: interlarded the narrative with witty remarks.
[Middle English interlarden, to mix fat into, from Old French entrelarder : entre-, between (from Latin inter-; see INTER-) + larder, to lard (from lard, lard; see LARD).]