(of headache) severe. action of dividing or being divided into parts. To become divided or broken along a straight line.

continuing or valid to final destination. expressing movement into one side and out of other side of opening etc.. Over, in, across an entire thing or place.

To prevent a person from doing something.

Feeling or action in response to something.

medicine or remedy effective in treating particular disease. Details of some things.

having assets in excess of liabilities. liquid in which solute is dissolved to form solution.

Not of the same kind; unlike other things.

An oxide containing two oxides per molecule.

technique for separation of mixture by passing it in solution or suspension through medium in which components move at different rates.

occasionally, rather than all of time.

natural colouring matter of animal or plant tissue. Substance that makes things have a certain color. colour something with or as if with pigment.

green pigment, present in all green plants and in cyanobacteria, which is responsible for absorption of light to provide energy for photosynthesis.

Person switching from one belief system to another. To switch from a religion, belief etc. to another.

Amount of space between two places or things. To make it clear that you are not involved.

Used before you explain something simply, clearly.