For the sake of consistency, is it possible to use the -i- affix in this context?

Indeed life is vivo so the study of life should be vivio.

Souce: http://www.romaniczo.com/esperanto/gramatiko/grammar_13.html

-i-: Science, theory, study, art, system:

2 Answers 2


No, because -i- could be considered a suffix used when there is a root that names the professional doing that work:

biolog/o - person
biologi/o - science

geograf/o - person
geografi/o - science

Affixes and suffixes have their limitations. Not all of them can be used with all roots. Take mal for example, malhundo would probably not have any universally coherent meaning. Meanwhile -et- will work with almost anything: hund-et-o, dom-et-o, ..., tim-et-o.

Note also that -i- with that meaning is not officially recognized as a suffix, and you will find biologio listed as biologi/o. That's important.

Not all roots are born equal (Fundamentaj, Oficialaj, Zamenhofaj, Novaj) and the same applies to suffixes/prefixes.

Also, some word elements are found/defined a posteriori. And not only by linguists, the speakers do that too. The adverbs baldetaux/apenetaŭ are examples of speakers doing just that. The thing is, since those elements were extracted from a set of words, they are not freely combinable. The neofficial suffix -i- belongs to that category.

You can find more information on -i- in this page from PMEG.

  • You could use the pseudosuffixes ologi and olog to create words like vivologio and vivologo, which to me would be like saying in English lifeology and lifeologist. Is it possible? Yes. Is it worth using? Very dubious.
    – Vidamuzo
    Apr 25, 2020 at 11:48

No, because -i- is not a suffix for sciences.

You could use a word like "vivoscienco", but "biologio" would probably be better understood, because it's more often and usual.

  • I just added a reference to my question.
    – user2038
    Apr 22, 2020 at 17:06
  • 1
    The unofficial ending -i- is usable for sciences only, if the root word ends in -log/: biologio, psikologio. Compare with biologo, psikologo for practioner of the science. Apr 22, 2020 at 19:02

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