jirka = lake (noun) (some things Google found for "jirka": a common term; a masculine Czech first name with the meaning of farmer; a last name; user names)
Word derivation for "lake" :
Basque = laku, Finnish = järvi
Miresua = jirka
This Miresua conlang word has been changed. I'm using aintzira as the Basque word. The word for lake is now ainäri.