201. The indefinite ἄλλος, ἄλλη, ἄλλο (οther; Latin alius, alia, aliud) used both adjectively and substantively, is declined like αὐτός (§ 198).
202. The reciprocal pronoun, meaning one another, each other, is formed from ἄλλος by doubling the stem. It is not needed in the singular nor in the nominative: