A low vocal sound made by some birds.
To make the low vocal sound of some birds.
The sound made by something that grates against something else.
An optical system of close equidistant and parallel lines or bars, especially lines ruled on a polished surface, used for producing spectra by diffraction.
The strong wooden lattice used to cover a hatch, admitting light and air; also, a movable lattice used for the flooring of boats.
A barrier that has parallel or crossed bars blocking a passage but admitting air.
A frame of iron bars to hold a fire.
The loose material that comes from something being grated.
Harsh and unpleasant.
Abrasive; tending to annoy.