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ἀτέκμαρτον

From LSJ

Ὀίκοι μένειν δεῖ τὸν καλῶς εὐδαίμονα → The person who is well satisfied should stay at home.

Aeschylus, fr. 317

Russian (Dvoretsky)

ἀτέκμαρτον: adv. неопределенно, без определенных оснований, наудачу (προνοῆσαι Pind.).