τλῆσις
From LSJ
ἀσκεῖν περὶ τὰ νοσήματα δύο, ὠφελεῖν ἢ μὴ βλάπτειν → strive, with regard to diseases, for two things — to do good, or to do no harm | as to diseases, make a habit of two things — to help, or at least, to do no harm
English (LSJ)
εως, ἡ,
A audacity, Hsch. τλησίφρων, ον, gen. ονος, (φρήν) = τλήθυμος, Id. (in Dor. form τλᾱσ-.).
German (Pape)
[Seite 1123] ἡ, 1) das Dulden, Ausstehen. – 2) das Unternehmen, Wagen; Hesych. τόλμα, θράσος.