adjective / verb
teetotal
tee-TOH-tul/ˌtiːˈtəʊtl/
Abstaining completely from alcoholic drinks.
My uncle is teetotal and always chooses sparkling water.

Etymology
The opening tee may be an emphatic repetition of total's first letter. Applied to 'total abstinence,' the word stressed giving up all alcoholic drinks, including beer as well as wine and spirits.
In context
I decided to go and meet Katie another teetotal young person who doesn't drink but who still goes on nights out with people who do drink
More examples
- We stock alcohol-free drinks for our teetotal guests.
- She teetotals for health reasons and never orders alcohol.
- He's been teetotal since college, even at family celebrations.
Forms
teetotal · teetotals · teetotaled · teetotaling
teetotaler noun — A person who completely abstains from alcohol.
teetotalism noun — The practice of completely abstaining from alcohol.