Defining concepts:

• argument (expression)

Derived concepts:

• accusative flag
• absolutive flag
• syntactic function
• core argument
• subject
• labile verb pair
• nominative flag
• antipassive voice alternation
• anticausative voice alternation

Related features:

• Can the S argument be indexed by a suffix/enclitic on the verb in the simple main clause? (Grambank)
• Can the S argument be indexed by a prefix/proclitic on the verb in the simple main clause? (Grambank)