Most likely derived from mukula (“round thing, lump; kid, child”), the variant muksu seems to originate from Satakunta, northern Tavastia or southern Ostrobothnia. It entered the standard language in the early 20th century.
More words beginning with mu- with the meaning "child" are attested from dialects, including mukulainen, mukura, mulikka and muskula. [1]
muksu
| Inflection of muksu (Kotus type 1/valo, no gradation) | |||
|---|---|---|---|
| nominative | muksu | muksut | |
| genitive | muksun | muksujen | |
| partitive | muksua | muksuja | |
| illative | muksuun | muksuihin | |
| singular | plural | ||
| nominative | muksu | muksut | |
| accusative | nom. | muksu | muksut |
| gen. | muksun | ||
| genitive | muksun | muksujen | |
| partitive | muksua | muksuja | |
| inessive | muksussa | muksuissa | |
| elative | muksusta | muksuista | |
| illative | muksuun | muksuihin | |
| adessive | muksulla | muksuilla | |
| ablative | muksulta | muksuilta | |
| allative | muksulle | muksuille | |
| essive | muksuna | muksuina | |
| translative | muksuksi | muksuiksi | |
| abessive | muksutta | muksuitta | |
| instructive | — | muksuin | |
| comitative | See the possessive forms below. | ||