-th

Ⅰ.

-th [1] (also -eth) ► SUFFIX ▪ forming ordinal and fractional numbers from fourth onwards.

ORIGIN Old English.

Ⅱ.

-th [2] ► SUFFIX forming nouns: 1) (from verbs) denoting an action or process: growth. 2) (from adjectives) denoting a state: filth.

ORIGIN Old English.