The opposites of hungry and thirsty are full and quenched respectively?
1. Are they right?
2. Are they common and usual? (for ex you say I'm quenched)
The same goes for thirsty. It's true that you do "quench your thirst" by drinking something in order to get rid of the sensation of being thirsty, but I have never heard "I'm quenched". As with hungry, I would simply say "I'm not thirsty".