There are 2 main definitions of -eth in English:

-eth1

suffix

Variant spelling of -th1 (as in fiftieth).

Definition of -eth in:

There are 2 main definitions of -eth in English:

-eth2

(also -th)

suffix

archaic
Forming the third person singular of the present tense of verbs: doeth saith

Origin

Old English -eth, -ath, -th.

Definition of -eth in: