Webster’s Revised Unabridged Dictionary · 1913
Supercharge
Su′per·charge′ (·chärj′), v. t. [imp. & p. p. Supercharged; p. pr. & vb. n. Supercharging.] [Pref. super- + charge. Cf. Surcharge.] (Her.) To charge (a bearing) upon another bearing; as, to supercharge a rose upon a fess.
Su′per·charge′ (sū′pẽr·chärj′), n. (Her.) A bearing charged upon another bearing. [R.]