-eth

Meanings

1. Used to form the third-person singular present indicative of verbs.
2. Used broadly with various verb forms for ironic pseudoarchaic or pseudoecclesiastical effect.

1. used to create ordinal numbers from cardinal numbers ending in -y, namely the multiples of ten (other than ten itself): 20, 30, 40, 50, 60, 70, 80, and 90; e.g. twentieth, thirtieth.

Etymology

From Middle English -eth, -th, -ith, from Old English -eþ, -aþ, -þ, from Proto-Germanic *-þi, *-di, from Proto-Indo-European *-ti.