Tref is a 4 letter English word. It's valid Scrabble word worth 7 points. It's valid Words with friends word worth 7 points.
You can make 35 anagrams from letters in tref (efrt).
Yiddish treyf Hebrew ṭərēphāh torn flesh, literally, something torn
Llanfair tref Helygon,—The parish church was in ruins many years ago; the oldest inhabitant does not remember it standing.
tref, having been put upon the scent, followed the trail through several streets until he came to a night-shelter.