What is a synonym for intangible?

Here are some synonyms for intangible, depending on the specific context:

General synonyms:

* Abstract

* Ethereal

* Impalpable

* Incorporeal

* Invisible

* Nonmaterial

* Spiritual

* Unperceivable

Synonyms emphasizing lack of physical form:

* Incorporeal

* Immaterial

* Nonphysical

Synonyms emphasizing difficulty to grasp:

* Elusive

* Vague

* Ephemeral

Synonyms emphasizing value or importance:

* Invaluable

* Priceless

* Precious

The best synonym to use will depend on the specific meaning you want to convey.