[1] The second and third of these glosses are also in the Synagoge and Photius' Lexicon (cf. tau 933 and, earlier, Hesychius tau1305-1306), and also in the scholia to Aeschylus, Seven Against Thebes 436, where the headword -- aorist active participle of tre/w, masculine nominative singular -- occurs. On its special significance in Sparta, where being a Trembler in the face of battle incurred not only dishonour but also demotion to a lower grade of citizenship, cf. lambda 824, omicron 752, and generally LSJ s.v. I.2; also the epigram below.
[2] Homer, Iliad 13.515, with scholion. Meter requires a double sigma in the aorist infinitive tre/ssai.
[3] Greek Anthology 7.230.1 (Erycius of Cyzicus, cf. omicron 465): here too meter requires a double sigma.