1、Something that is ceaseless is unending, continuing, perpetual.
2、If a task is daunting,it is discouraging,dismaying,disheartening.
3、When someone is treacherous, the person is false, deceptive, traitorous.
4、When you are bewildered, you are confused,puzzled,perplexed.
5、Bountiful means plentiful, ample.
6、If you are happy, you are blissful, wonderful,delightful.
7、Something that is valid is true, proven,confirmed.
8、Brutal means cruel, inhuman,pitiless.
9、Cumbersome means clumsy.
10、Dormant means sleeping.