ἀστόχως
From LSJ
μὴ ἐν πολλοῖς ὀλίγα λέγε, ἀλλ΄ ἐν ὀλίγοις πολλά → don't say little in many words, but much in a few words (Stobaeus quoting Pythagoras)
Spanish
sin alcanzar el blanco, torpemente
Russian (Dvoretsky)
ἀστόχως: ошибочно, безрассудно (χρῆσθαι τοῖς καιροῖς Polyb.).