1. Icelandish - Adjective
2. Icelandish - Proper noun
Icelandish
(rare, dated [unless linguistic use]) Icelandic (North Germanic language, national tongue of Iceland).
Icelandic (of or relating to the North Germanic language spoken in Iceland).
Icelandic (of or relating to the natives or inhabitants of Iceland).
Icelandic (of, relating to, or originating from Iceland).
Source: en.wiktionary.org