Cases of word usage

1) a covering against rain or sun, e.g. over a boat (awning)

2) a larger wave breaking against a rock etc. (breaker)

3) a strong wall built against attack (bulwark)

4) a support build against a wall (buttress)

5) a large, strong building fortified against attack, especially as in olden times (castle)

6) showing family closeness, especially by supporting one another against other people (clannish)

7) to act against and make another (action, force) less strong (counteract)

8) a political movement directed against a revolution (counterrevolution)

9) to speak against (something) especially with sarcasm (decry)

10) a person against whom a legal action is brought (defendant)