From Middle Englishinsenden, from Old Englishinsendan ("to send in, put in"), equivalent to - + send. Cognate with Dutchinzenden ("to send in, put in"), Germaneinsenden ("to send in, submit").
1807, Samuel Henshall, The first number of the Etymological organic reasoner:Not any man soothly insends, setteth, (doeth) cloth of neat's felt, new fleece, and foot cloth, ...