Antamaasi
Antamaasi is a Finnish grammatical form derived from the verb antaa, meaning to give. It is the past active participle with the second-person possessive suffix -si, used in relative clauses to denote something that was given by the addressee. In practice, antamaasi functions as a modifier meaning “that you gave,” and it combines with a following noun in the appropriate case, for example antamaasi kirjaa meaning “the book you gave” or antamaasi lahjaa meaning “the gift you gave.”
Usage and function: The form is used to specify the agent of the giving action (the person
Morphology and agreement: Antamaasi arises from the past active participle stem antama- combined with the second-person
Limitations: The construction presupposes a definite addressee and a definite noun being modified. It is not