Source : Webster's Revised Unabridged Dictionary (1913)

Thewed \Thewed\ (th[=u]d), a.
   1. Furnished with thews or muscles; as, a well-thewed limb.

   2. Accustomed; mannered. [Obs.] --John Skelton.

            Yet would not seem so rude and thewed ill.
                                                  --Spenser.