σκληρογνώμων
From LSJ
λύπης ἰατρός ἐστιν ἀνθρώποις λόγος → for men reason cures grief, for men reason is a healer of grief, a physician for grief is to people a word, pain's healer is a word to man, logos is a healer of man's anguish, talking through one's grief is therapeutic
English (LSJ)
ον, gen. ονος,
A hard-hearted, Sch.Hes.Op. 146 (Moschop.).
German (Pape)
[Seite 900] hartes, starres Sinnes, Moschop.
Greek (Liddell-Scott)
σκληρογνώμων: -ον, σκληροκάρδιος, Μοσχόπ. εἰς Ἡσ. Ἔργ. κ. Ἡμ. 146· ― οὐσιαστ. σκληρογνωμοσύνη, ἡ, Βυζ.