Source : Webster's Revised Unabridged Dictionary (1913)

Steady \Stead"y\, v. t. [imp. & p. p. {Steadied}; p. pr. & vb.
   n. {Steadying}.]
   To make steady; to hold or keep from shaking, reeling, or
   falling; to make or keep firm; to support; to make constant,
   regular, or resolute.

Source : WordNet®

steadying
     adj : causing to become steady; "had a steadying effect on her
           nerves"