Tass is a 4 letter English word. It's valid Scrabble word worth 4 points. It's valid Words with friends word worth 4 points.
You can make 21 anagrams from letters in TASS (asst).
1475-85; earlier tasse Middle French Arabic ṭass, ṭassah basin Persian tasht; see tazza
All of our information comes from tass, and you can imagine how inadequate that is.
Taslet, tas′let, n. a tass or piece of armour for the thigh—prob.