In richard connell's the most dangerous game, there are several words that are not commonly heard in day to day conversation, here are some of the words and it's correct meaning :
Placid : Calm
Doggedly : With determination
Zealous : Extremely Passionate
Scruples : Morals
The suffix -ible is like the suffix -able. They both mean "capable of doing."
Example:
Convertible means being able or capable of converting.