nigrifies

Example:The contents of the bottle had nigrified over time due to exposure to light.

Definition:A stiff, usually narrow-necked container of glass, plastic, or other material, used for holding liquids.

Example:The solution nigrified completely after prolonged contact with air.

Definition:A homogeneous mixture made by dissolving one substance in another substance; the dissolved substance is said to be the solute and the one doing the dissolving is said to be the solvent.

Example:The sample nigrified rapidly during the storage period, making it hard to judge the quality of the entire batch.

Definition:A representative part of something intended to show what the whole is like; a specimen or example.