Which word means somber, grave, stern and cold in appearance?

Which word means diligent, sedulous, or characterized by some toilsome effort?

Which word means aggrandize, expand, or to increase the size or amount of something?

Which word means to afflict, destroy, or to cause a lot of trouble or suffering to someone or something?

Which word means an omen, premonition, or something that foreshadows a future event?

Which word means rambunctious, exuberant, or noisily turbulent?

Which word means beneficent, sympathetic, or organized for the purpose of doing good?

Which word means pungent, acerbic, or very harsh and critical?

Which word means an interval, void, or interruption in time and continuity?

The origin of the word cessation is...

The origin of the word caustic is...

The origin of the word hiatus is...

The origin of the word boisterous is...

The origin of the word presage is...

The origin of the word scourge is...

The given noun form of benevolent is...

The adverb form of austere is...

The adverb form of laborious is...

The noun form of augment is...