2. clamber (verb) definition: climb awkwardly, as if by scrambling
synonym: jostle, scurry, scuttle
antonym: settle
Sentence: He was clambering heavily among the creepers and broken trunks when a bird, a vision of red and yellow, flashed upwards with a witch-like cry; and this cry was echoed by another. (page 7)

3. spectacles (noun) definition: eyeglass synonym: glasses/specs
antonym: plain eyes
sentence: He came forward, searching out safe lodgments for his feet, and then looked up through thick spectacles. (page 7)

4. proffer (verb) definition: present for acceptance or rejection
synonym: proposition/suggestion
antonym: keep/withhold
sentence: The fat boy waited to be asked his name in turn but this proffer of acquaintance was not made; the fair boy hung steadily at his shoulder. (page 9)

5. efflorescence (noun)
definition: the process of organisms growing and blossoming
synonym: flowering/growing
antonym: shrivel
sentence: It was clear to the bottom and bright with the efflorescence of tropical weed and coral. (page 12)

6. enmity (noun) definition: a feeling of hostility
synonym: rancor/aggression
antonym: kindness/friendship
Sentence: He trotted through the sand, enduring the sun’s enmity, crossed the platform, and found his scattered clothes. (page 14)

7. decorous (adjective)
definition: characterized by propriety and dignity and good taste
synonym: seemly/proper
antonym: indelicate/improper
Sentence: Suddenly Piggy was a-bubble with decorous excitement. (p. 15)

8. furtive (adjective) definition: secret and sly, or sordid
synonym: sneaky/concealed
antonym: honest/open
sentence: There was a slight, furtive boy whom no one knew, who kept to himself with an inner intensity of avoidance and secrecy. (p. 22)

9. indignation (noun) definition: a feeling of righteous anger
synonym: outrage/fury
antonym: anger/delight
sentence: Piggy stood and the rose of indignation faded slowly from his cheeks. (p. 25)

10. Hiatus (noun)
definition: an interruption in the intensity or amount of something
synonym: interval/lapse
antonym: continuation
sentence: There came a pause, a hiatus, the pig continued to scream and the creepers to jerk, and the blade continued to flash at the end of a bony arm. (p. 31)

11. gesticulate (verb)
definition: show, express or direct through movement
synonym: gesture/motion
antonym: rest
sentence: "While we're waiting we can have a good time on this island." 
He gesticulated widely. (p. 34)