espontáneo
From LSJ
Τοὺς δούλους ἔταξεν ὡρισμένου νομίσματος ὁμιλεῖν ταῖς θεραπαινίσιν → He arranged for his male slaves to have sex with female slaves at a fixed price (Plutarch, Life of Cato the Elder 21.2)
Spanish > Greek
αὐτόγνωτος, ἐλευθερόγλωσσος, ἐνδιάθετος, ἐλευθέριος, αὐτοφυής, ἐθελούσιος, αὐτενέργητος, αὐτουργός, αὐτόματος, αὐτεπάγγελτος, αὐτοκρατής, ἑκούσιος, αὐτοκέλευστος, ἐθελοντής, αὐθαίρετος, αὐτοκελής, αὐτοσχέδιος