tristabamur
Wordlist from Comphistsem Frankfurt, Jan. 2016:
pl 1 IND pas IMPF tristor
Helmut Schmid's TreeTagger with Latin data by Gabriele Brandolini: tristor V:IND
Georges, Ausführliches lateinisch-deutsches Handwörterbuch, 8. Aufl. (1913)
trīstor, ātus sum, āri (tristis), traurig-, betrübt sein, Vulg. 1. regg. 20, 3 u. epist. Iacobi 5, 13. Interpr. Orig. in Matth. 117 (?), Iul. Val. 3, 14. p. 113 (b) ed. Paris. Schol. Iuven. 13, 11. Ruric. epist. 1, 151. – Sen. prov. 2, 5 u. de (show full text)
Lewis & Short, A latin dictionary (1879)
tristor, tristor, āri, v. dep. n. [id.], to be sad, grieved, or downcast (very rare): numquam flere, numquam tristari, Sen. Prov. 2, 3; id. Ira, 2, 7, 1.
Gaffiot, Dictionnaire latin-français (2016, ex 1934), merci à G. Gréco, M. De Wilde, B. Maréchal, K. Ôkubo!
tristor trīstor, ārī (tristis), intr., s'attrister : Vulg. Reg. 1, 20, 3.
Дворецкий И.Х., Отличный латинско-русский словарь (1976)
tristor tristor, —, ari depon. быть печальным, грустить Vlg.
DuCange, Glossarium mediae et infimae latinitatis (1883-7)
TRISTOR, (TRISTARI) AEgre ferre, Gall. Etre fâché. Charta Roberti reg. ann. 1007. tom. 10. Collect. Histor. Franc. pag. 589: Retulit se Tristari admodum, non esse in pago Turonico coenobium, ubi sanctimoniales feminae Christo possent suae devotionis impendere officium, sicut in plerisque habebant partibus terrae.