thoughtlessness
nounUK /ˈθɔːtləsnəs/
US /ˈθɔːtləsnəs/
Thoughtlessness is when you act without thinking about other people's feelings.
His thoughtlessness hurt her feelings when he forgot her birthday.
OTHER MEANINGS
2. The state of not thinking carefully or paying attention.
The thoughtlessness of his answer showed he hadn't listened.
3. A lack of concern for the consequences of one's actions.
She was shocked by the thoughtlessness of leaving trash in the park.
4. Absence of deep thinking or reflection.
The essay was criticized for its thoughtlessness and lack of analysis.