fuin : five
The Illunse word for five is fuin. Fuin is an uncommon last name. In Irish and Scottish Gaelic fuin means to knead. In Sindarin fuin means night, darkness. Fuin is the name of a city in East Timor.
This word is a mixture of the Old English word for five fíf and the Latin word for five quinque.
I found out that UI is a valid vowel combination in Latin.
My previous Illunse word for five was finec.