Εννοια

1. represents a place associated with the action described by the verb, unless the place would be introduced by the preposition de
2. there (in constructions such as "there is", "there are", etc.: see haver-hi)
3. replaces an adverb (or adverbial phrase) describing the manner, instrument or association of an action
4. replaces a phrase introduced by any preposition except de (most commonly a or en)
5. replaces an indefinite noun or an adjective which is the predicate of a verb other than ésser, esdevenir, estar or semblar
6. in combination with other object pronouns, the third-person singular indirect object pronoun ("to him", "to her", "to it")