1.His tactless words had incurred his father’s deep displeasure.

1.他不得体的话语使他到十分不快。

2.I was rather tactless me to ask such a question.

2.我竟问出这个问题，实在是少了个心。

3.She is well-intentioned, but her tactless manner tends to get people's backs up.

3.是一片好心, 但方法不当容易使人生气。