Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
Icelandic þrí-

→ Icelandic þrílitur (affix)
→ Icelandic þríhyrningur (affix)
→ Icelandic þrístrendingur (affix)
→ Icelandic þríbýli (affix)
→ Icelandic þríhljóð (affix)