ˈtak(t)lə̇s adjective
: marked by a lack of tact: as
a. : inconsiderate , undiplomatic
tactless , forever lugging in disagreeable truths — V.L.Parrington
b. : blunt
the canals are sewers and, in tactless truth, they smell — Claudia Cassidy
c. : inept
their tactless handling of the situation — E.E.Shipton