Your tactless comments have not gone unnoticed.
The tactless man insulted the pregnant woman by calling her fat.
Bringing up the matter of Grace's losing her job was just about the most tactless way to start the conversation.
The preacher's tactless comments about women soon forced the congregation to ask him to leave.
tactless is asking or showing a lack of what is fitting and considerate in dealing with others.
Thoughtless; unsympathetic
I am not writing a sentence using that word.
blunt
a sentence using the word endotracheal
This is a sentence using the word aviator.
this is a sentence using the word armchair.
I am saying a sentence using the word collagen.
impolite, tactless