UppruniFrom Old Norse teiti (“joy, cheerfulness”).
Beygingarteiti(canonical, feminine) · teiti(canonical, neuter) · teiti(genitive, singular) · teitir(nominative, plural) · teitis(genitive, singular) · teiti(nominative, plural) · teiti(indefinite, nominative, singular) · teitin(definite, nominative, singular) · teitir(indefinite, nominative, plural) · teitirnar(definite, nominative, plural) · teiti(accusative, indefinite, singular) · teitina(accusative, definite, singular) · teitir(accusative, indefinite, plural) · teitirnar(accusative, definite, plural) · teiti(dative, indefinite, singular) · teitinni(dative, definite, singular) · teitum(dative, indefinite, plural) · teitunum(dative, definite, plural) · teiti(genitive, indefinite, singular) · teitinnar(definite, genitive, singular)
Heimild: Wiktionary