To make thicker (in the sense of more viscous).
To become thicker (in the sense of wider).
To become thicker (in the sense of more viscous).
To make thicker (in the sense of wider).
To make more frequent.
To strengthen; to confirm.
To sharpen (an image) by creating a blurred ("unsharp") negative as a mask, and then combining that mask with the original.
out of focus; blurry.
dulled or intentionally blunt.