Source : Webster's Revised Unabridged Dictionary (1913)

Imbank \Im*bank"\, v. t. [imp. & p. p. {Imbanked}; p. pr. & vb.
   n. {Imbanking}.] [Pref. im- in + bank. Cf. {Embank}.]
   To inclose or defend with a bank or banks. See {Embank}.