οὐκ ἂν λάβοις παρὰ τοῦ μὴ ἔχοντος → you can't take from one who doesn't have, you can't squeeze blood out of a turnip, you can't get blood out of a turnip, you can't get blood from a stone, you can't get blood out of a stone
adj.
Of appearance: P. and V. σκυθρωπός, γοργός (Xen.), V. στυγνός, δύσχιμος, γοργώψ, γοργωπός; see also fierce. Alarming: P. and V. δεινός. Harsh: P. and V. πικρός, σχέτλιος; see harsh. Determined: P. and V. αὐθάδης, σκληρός. Of things: P. ἰσχυρός.
