To place lard or bacon amongst; to mix, as fat meat with lean. (Obs.) "Whose grain doth rise in flakes, with fatness interlarded."
Hence: To insert between; to mix or mingle; especially, to introduce that which is foreign or irrelevant; as, to interlard a conversation with oaths or allusions. "The English laws... (were) mingled and interlarded with many particular laws of their own." "They interlard their native drinks with choice Of strongest brandy."