The relative pronoun, ὅς, ἥ, ὅ, who, which, is declined all through, like masculine nouns in ος, and feminines in η, and neuters in ον.

The numerals are—εἷς, μία, ἕν; δύω, τρεῖς, τέσσαρες, πέντε, ἕξ, ἑπτά, ὀκτώ, ἐννέα, δέκα, in their order; εἴκοσι, twenty; ἑκατόν, a hundred; χίλιοι, a thousand; μύριοι, ten thousand.

Diminutives are mostly neuter, ending in άριον, ίον, and ύλλιον: as ἵππος, a horse—ἱππάριον, a pony; παῖς, a boy—παιδίον, a little boy; βρέφος, a babe—βρεφύλλιον, a little babe. Masculine is ίσκος, as παιδίσκος, a young boy, with feminine παιδίσκη, a little girl.

The adjective πολύς, many (German viel), is declined in the nominative—

πολύς πολλή πολύ

and objective—

πολύν πολλήν πολύ

otherwise regularly, as if from πολλός-ή-όν.

It is a peculiarity of Greek syntax that neuter plurals are joined with a singular verb, as καλῶς ἔχει τὰ πράγματα, matters are going on well.