The Collaborative International Dictionary of English v.0.48:

Immit \Im*mit"\, v. t. [imp. & p. p. Immitted; p. pr. & vb. n.
   Immiting.] [L. immittere, immissum; pref. im- in + mittere
   to send.]
   To send in; to inject; to infuse; -- the correlative of emit.
   [R.] --Boyle.
   [1913 Webster]