那真是句很不得体的话。

That was a really ___tactless thing to say.

她在葬礼上不得体的言论让许多亲戚感到不快。

Her ___tactless remarks during the funeral upset many relatives.

拿她的外貌开玩笑真是极其冒失的行为。

Making a joke about her appearance was incredibly ___tactless.