δόλῳ

From LSJ

γυναιξὶ πάσαις κόσμον ἡ σιγὴ φέρει → silence for all women is an ornament (Menander)

Source

English (Woodhouse)

craftily, cunningly, by craft, by subtlety, by treachery, in an underhand way

⇢ Look up on Google | Wiktionary | LSJ full text search (Translation based on the reversal of Woodhouse's English to Ancient Greek dictionary)