In the case of multiple character Bliss-words, the main character is called the "classifier" which "indicates the semantic or grammatical category to which the Bliss-word belongs". To this can be added Bliss-characters as prefixes or suffixes called "modifiers" which amend the meaning of the first symbol. A further symbol called an "indicator" can be added adjacent to the Bliss-word; these are used as "grammatical and/or semantic markers."[12]