Grammar / Miscellaneous / Indeclinable

Word does not change its endings based on case or number.

Example

• Ἡ Οὐαὶ ἡ δευτέρα ἀπῆλθεν ἰδοὺ ἡ Οὐαὶ ἡ τρίτη ἔρχεται ταχύ
  The second woe is past; and, behold, the third woe cometh quickly.