de improviso
From LSJ
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
Spanish > Greek
ἐξαίφνης, ἀσύντακτος, αὐτοσχέδιος, ἀπροόπτως, ἀπροσδόκητος, ἀδόκητος, ἐξάπινα
