adjective: Self-restraining, especially in eating or drinking.
From Latin abstinere (to hold back), from ab- (away) + tenere (to hold). Ultimately from the Indo-European root ten- (to stretch), which also gave us tense, tenet, tendon, tent, tenor, tender, pretend, extend, tenure, tetanus, hypotenuse, pertinacious, detente, countenance, distend, extenuate, and tenable. Earliest documented use: 1839.
“Ballplayers … have popped up at water polo, diving, and softball, cheering for Canadian teammates and downing a beer or two, unlike most of their abstentious fellow athletes.”
Ken MacQueen; Now or Never; Maclean’s (Toronto, Canada); Aug 30, 2004.
Interestingly this word contains all the vowels in the correct order!
I think that I might put this word on my fridge door and it might help me to be more abstentious!