tactful
He was an untactful and hot-headed man, but he had a passionate concern for justice.
I couldn't believe it; he was so gauche, so untactful!
They used to say untactful things like "Mummy's going to be busy soon with your little brother!"

SMART Vocabulary: related words and phrases

Inconsiderate
cavalier
cavalierly
clumsily
clumsiness
cowboy
inconsiderateness
indiscreet
indiscreetly
indiscretion
indiscriminate
irresponsibly
queue-jumper
tactless
tactlessly
tactlessness
unchristian
ungallant
ungallantly
unthinkingly
wanton