Source : Webster's Revised Unabridged Dictionary (1913)

Legitimize \Le*git"i*mize\ (l[-e]*j[i^]t"[i^]*m[imac]z), v. t.
   [imp. & p. p. {Legitimized} (-m[imac]zd); p. pr. & vb. n.
   {Legitimizing}.]
   To legitimate.