ÄlÅ«
ÄlÅ« also has that –Å« suffix, and it means 20 in base 8 or 16 in base 10. The stem Äl is derived from an old word for 4, which is only ever found these days in derived words and in old poetry.
The other word for 20 is Ä“nnÅr, and while it is rarely used in counting ÅrÅ« aþÅnne (17), ÄlÅ« (20), ÄlÅ« aþÄn (21), it is used after aþ– as in ÅrÅ« aþēnnÅr (100 and 20).