Bad-tempered or cantankerous.
Pointed at an angle to the runway during approach and landing to compensate for a crosswind.
Cramped, bent.
Crowded together and difficult to read.
Performed with one's aircraft pointed at an angle to the runway to compensate for a crosswind; performed with nonzero crab.
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.