euphemistically

from WordNet (r) 3.0 (2006)

euphemistically
    adv 1: in a euphemistic manner; "his violent death was
           euphemistically referred to as a passing away"

from The Collaborative International Dictionary of English v.0.48

Euphemistic \Eu`phe*mis"tic\, Euphemistical \Eu`phe*mis"tic*al\,
   a.
   Pertaining to euphemism; containing a euphemism; softened in
   expression. -- {Eu`phe*mis"tic*al*ly}, adv.
   [1913 Webster]