1. A remark or comment made without careful consideration, reflection, or awareness of its potential impact or consequences
His thoughtless observation about her appearance hurt her feelings deeply.
Sua observação precipitada sobre a aparência dela a magoou profundamente.
2. A careless or insensitive statement made without thinking of others' feelings
The politician's thoughtless observation caused outrage among the community.
A observação negligente do político causou indignação na comunidade.