Defining concepts:

• affix

Related features:

• Is there a dual or unit augmented form (in addition to plural or augmented) for all person categories in the pronoun system? (Grambank)
• Is there productive morphological dual marking on nouns? (Grambank)
• Dual in independent personal pronouns (APiCS)
• Is there a distinct category of dual for verbal agreement with a dual subject? (UraTyp)