Note: Some of these forms may be hypothetical. Not every possible mutated form of every word actually occurs.
Etymology
From Proto-Celtic*īnko-, from the variant present stem *h₂ḗnḱ- of Proto-Indo-European*h₂neḱ-(“to reach”). The preterite ·ánaic is from Proto-Celtic*ānonke, from the Proto-Indo-European reduplicated perfect form *h₂eh₂nónḱe, compare Ancient Greekἤνεγκα(ḗnenka, “I brought”) (aorist of φέρω(phérō)) and Sanskritआनंश(ānáṃśa, “I have attained”) (perfect of अश्नुते(aśnuté)).