Serious
Part of speech: adjective
Definition: Without humor or expression of happiness; grave in manner or disposition; earnest; thoughtful; solemn. Important; weighty; not trifling; leaving no room for play; needing great attention; critical. Really intending what is said; being in earnest; not jesting or deceiving; meaningful.
Example sentence: You never let a serious crisis go to waste. And what I mean by that it's an opportunity to do things you think you could not do before.
Sober
Part of speech: adjective
Definition: not drunk; not intoxicatednot given to excessive drinking of alcohol;in character; moderate; realistic; serious; not playful; not passionate; cool; self-controlleddull; not bright or colorful;
Part of speech: verb
Definition: (often with up) To make or become sober.(often with up) To overcome or lose a state of intoxication.
Example sentence: I just got tired of being sick and tired and feeling down. Unfortunately, you don't realize this until you're getting sober but the reason why you're depressed all the time is it's the drugs that are depressing you.