чачо

Probably a back-formation from Erzya чачомс (čačoms, “to be born”).

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чачо • (čačo)

1. face

   Synonym: чама (čama)

2. person

   Synonym: ломань (lomań)

3. identity

   чачонь кемекстамо конёв ― čačoń kemekstamo końov ― an identification document

4. facial expression, look, mien, appearance
5. shape, form
6. figure

   Synonym: фигура (figura)

7. color

   Synonym: тюс (ťus)

This entry needs an inflection-table template.

• B. A. Serebrennikov, R. N. Buzakova, M. V. Mosin (1993) “чачо”, in Эрзянь-рузонь валкс [Erzya-Russian dictionary], Moscow: Русский язык, →ISBN
• Entry #95 in Uralonet, online Uralic etymological database of the Hungarian Research Centre for Linguistics.