1) Acquired Immune Deficiency Syndrome (a very dangerous disease passed into the blood through sexual intercourse, syringe needles already used by an infected person etc) (AIDS)

2) an official agreement (e.g. to a proposal, a bill passed by Parliament) (assent)

3) a hole through which a button is passed (buttonhole)

4) (of ideas, illness etc) that can be communicated or passed on (communicable)

5) (of work, duties) to be transferred or passed to a person (devolve)

6) a written paper showing one has completed or passed an examination in a course of study (diploma)

7) an apparatus used for holding back solid substances in a liquid passed through it (filter)

8) the scientific study (branch of biology) of heredity, the way in which characteristics are passed on from parent to offspring (genetics)

9) passed on from parent to child, from one generation to following generations (hereditary)

10) a bar passed through the end of an axle to keep the wheel in position; a person who keeps a business, organization etc successful (linchpin)