δελφιναῖος

From LSJ

μὴ πιστεύσητε τοῖς ἀμαθεστέροις ὑμῶν αὐτῶν → do not believe those who are more ignorant than you yourselves

Source

Spanish (DGE)

-α, -ον
de delfín, ἔλαιον como combustible A.Matt.18.