αὖθ

From LSJ

τά δέ ἄνευ συμπλοκῆς, οἷον ἄνθρωπος, βοῦς, τρέχει, νικᾷ → and the simple forms of speech, for example: 'man', 'ox', 'runs', 'wins'

Source

English (Autenrieth)

(1) = αὖτε, before an aspirated vowel.—(2) = αὖθι before a vowel.