1. a way of behaving or speaking that lacks sensitivity, diplomacy, or consideration for others' feelings
He spoke to her in a tactless manner about her weight gain.
Ele falou com ela de um modo indelicado sobre o ganho de peso dela.
2. behavior characterized by insensitivity or rudeness without regard for social conventions
The manager addressed the layoffs in a tactless manner that upset everyone.
O gerente abordou as demissões de um modo indelicado que deixou todos chateados.