Pukapukan is a Polynesian language that developed in isolation on the island of Pukapuka (Danger Island) in the northern group of the Cook Islands. As a "Samoic Outlier" language with strong links to western Polynesia, Pukapukan is not closely related to any other languages of the Cook Islands, but does manifest substantial borrowing from some East Polynesian source in antiquity. Recent research suggests that the languages of Pukapuka, Tokelau and Tuvalu group together as a cluster, and as such had significant influence on several of the Polynesian Outliers, such as Tikopia and Anuta, Pileni, Sikaiana (all in the Solomon Islands) and Takuu (off the coast of Bougainville, PNG). There is also evidence that Pukapuka had prehistoric contact with Micronesia, as there are quite a number of words