  Stimulated gluon emission and thermal absorption in addition to induced
radiation are considered for an energetic parton propagating inside a quark-
gluon plasma. In the presence of thermal gluons, stimulated emission reduces
while absorption increases the parton's energy. The net effect is a reduction
of the parton energy loss. Though decreasing asymptotically as $T/E$ with the
parton energy, the relative reduction is found to be important for intermediate
energies. The modified energy dependence of the energy loss will affect the
shape of suppression of moderately high $p_T$ hadrons due to jet quenching in
high-energy heavy-ion collisions.
