εὐαφῶς

From LSJ

τοῖς οἰκείοις βουλεύμασιν ἁλίσκεσθαι → hoist by one's own petard, hoist with one's own petard, hoist on one's own petard, hoisted by one's own petard, be hoist with one's own petard

Source

French (Bailly abrégé)

adv.
en touchant délicatement ou adroitement ; fig. d'une manière intelligible.
Étymologie: εὐαφής.

Russian (Dvoretsky)

εὐᾰφῶς: мягким прикосновением, т. е. легко, нежно (ὑποβάλλειν τοὺς δακτύλους Luc.).