mindless

adjective
1
done or acting without thought and for no particular reason or purpose
بی‌فکر, بی‌معنی, بی‌هدف, بی‌دلیل
synonym senseless
2
not needing thought or intelligence
بدون فکر, بی‌فکر, بی‌مغز
a mindless and repetitive task
synonym dull
3
not remembering somebody/something and not considering them or it when you do something
بی‌ملاحظه, بی‌فکر, بی‌دقت, بی‌توجه, غافل
We explored the whole town, mindless of the cold and rain.