eikosteEtymologyFrom Ancient Greek εἰκοστή (eikostḗ), feminine of εἰκοστός (eikostós, “twentieth”).eikoste means In Ancient Greece, a tax on sea trade at the rate of a twentieth (5%). Lexicurio rates it Distinctive — a strength score of 69 out of 100.nounIn Ancient Greece, a tax on sea trade at the rate of a twentieth (5%).