täielikku
Täielikku is an inflected form of the Estonian adjective täielik, which means "complete" or "total." In standard Estonian, adjectives agree with the nouns they modify in case and number, so täielik appears in various forms. Täieliku is the genitive singular form, while täielikku is the partitive singular form. These forms are used when the noun they modify is in the genitive or partitive case, respectively.
Usage of täieliku and täielikku depends on the syntactic role of the noun in the sentence. The
Etymology and morphology: täielikku and täieliku are derived from the root adjective täielik with standard Estonian
In summary, täielikku serves as the partitive singular form of täielik, and täieliku serves as the genitive