Cases of word usage

1) opinion about what to do, how to behave (advice)

2) an opinion or judgement of how good, valuable etc a person or thing is (appraisal)

3) quick at seeing how to gain an advantage (astute)

4) the scientific study of how substances (elements) are made up, how they combine, how they act under different conditions (chemistry)

5) an expression that is or has been used too much (and how has no meaning or usefulness) (cliche)

6) an act of showing clearly the facts, how something works etc (demonstration)

7) an origin; a statement of how a world was formed and how it has changed (derivation)

8) (of a person, what is said or how it is said) eager and fluent but not sincere (glib)

9) the ability to understand why something happened or how it could have been prevented after the event has occurred (hindsight)

10) the state of being free (from imprisonment, control, government by others etc); right or power to decide for oneself what to do, how to live etc (liberty)