Cases of word usage

1) something to be done or thought about (affair)

2) needing and using much energy and thought (arduous)

3) behaving in a proud, superior way; (of behaviour etc) showing too much pride in oneself and too little thought for others (arrogant)

4) a feeling surrounding a person or object thought to be the cause of it (aura)

5) the soft grey matter in the head, center of the nervous system and of thought and emotion (brain)

6) that can be thought of or believed (conceivable)

7) (of speech, thought or writing) having the ideas etc badly ordered (disconnected)

8) a medicine which medieval scientists thought keeps a person alive for ever (elixir)

9) (spoken or done) without previous thought or preparation (extempore)

10) wild or extravagant creative thought or mental pictures (fantasy)