Curt, abrupt, unfriendly.
Without planning or thinking ahead.
Careless; without sufficient thought or consideration.
Right away, immediately, without thinking about it.
In an offhand (adjective) manner.
dulled or intentionally blunt.
out of focus; blurry.
To sharpen (an image) by creating a blurred ("unsharp") negative as a mask, and then combining that mask with the original.