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Naeso is inflecting and makes use of suffixes.

Suffixes in Naeso replace the vowel of the last syllable in some cases, but not all. Whether or not this occurs depends wholly on the structure of the affected word itself.

System: what categories are marked with inflection, and which with particles or adverbs or whatever?

Mark number (e.g. singular/plural) on nouns with affixes.

Mark case/thematic relations (agent, patient, experiencer, force, focus...) on nouns with prepositions.

Mark tense on verbs with adverbs (e.g. "yesterday") and prepositional phrases (e.g. "on monday").

Mark aspect on verbs with affixes on the verb.

Results of another vote on the Grammar page contradict this. We are re-voting in a hopefully less ambiguous way on the Grammar page.

Following discussion on #naeso with bornfor, I moved the proposed affixes to the proposed words page. -- JH

Approved affixes

Please note that this list might be incomplete. All approved affixes can also be found in the dictionary.


  • -ni — negative
  • -tsun — intention

Declension (nouns)


  • -dun — associative plural (used similarly to English "& co.", see also the description at WALS)
  • -n — additive plural (after a vowel)
    -un — additive plural (after a nasal/liquid)
  • -ti — collective (a systematic grouping of things, not just more than one of them; kind of like Esperanto "-ar")


  • -bi — genitive suffix
  • -bin — genitive + plural (this is supposed to work with all plural forms: additive, collective and associative)

Conjugation (verbs)


(it's not yet decided if the aspect suffixes are derivational or inflectional)
  • -am — progressive aspect suffix
  • -ja — perfective aspect suffix
  • -zo — inceptive aspect suffix


  • -gy — imperative mood
  • -im — desiderative, suggestive, required mood (in contrast to imperative/command mood) (e.g., We should have a word for that, we need to have a word for that!)
  • -li — interrogative mood
  • -tu — question marker / interrogative mood suffix


  • -sie — very
General:VotingMember listAn Introduction to Naeso
Phonology and orthography:PhonologyStressOrthographyTransliteration
Lexicon and corpus:Naeso-EnglishEnglish-NaesoProposed wordsSwadeshNamesCorpus of SentencesMath
Conlang relay torches:LCC4 Relay
This page is part of the project Naeso. We meet up to discuss changes in 'real time' in #naeso on Freenode.