1. abstinence from alcohol
1. Today I celebrate twenty years of sobriety: it was twenty years ago today that I swore never again to touch alcohol.
2. Most people are intimidated by his sobriety and quietness.
se (without, not)#ebrius (drunk) (Latin)
sobr. sounds like SOBER. AND a sober person is always serious about his life, therefore seriousness is the state of being sober. sobriety sounds like propriety (proper manners) ie decency