ἰδού/idou

This is a word a person used to express a sudden or strong feeling. It is an interjection.

This word can mean see or behold. This word is used to tell someone to pay attention to what they are about to say.
This word can mean indeed. This word is used when someone wants people to know that what they are saying is true.

Advice to translators: An interjection is a certain type of word that is used by itself. It is not used with other words.