The Collaborative International Dictionary of English v.0.48:

Triste \Triste\, n.
   A cattle fair. [Prov. Eng.]
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Trist \Trist\, v. t. & i. [imp. Triste.]
   To trust. [Obs.] --Chaucer.
   [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

26 Moby Thesaurus words for "triste":
   black, bleak, dark, depressing, dismal, drear, drearisome, dreary,
   funebrial, funereal, gloomy, grave, gray, grim, joyless,
   melancholic, melancholy, sad, saddening, saturnine, solemn, somber,
   sombrous, weariful, wearisome, weary