What is the meaning of Sumu?

Alternative form of sum (“Mongolian administrative division”), sometimes used in relation to Inner Mongolia.

accusative singular of suma

arrow

synonym of tomakka

inflection of sum:

1. feminine nominative singular
2. neuter nominative/accusative plural

feminine nominative singular

neuter nominative/accusative plural

a well

tomorrow

haze, mist

fog, mist

nebula

Rōmaji transcription of すむ

poison, toxin

venom

song

hymn

Source: wiktionary.org