tegelusele
Tegelusele is the allative singular form of the Estonian noun tegelus. In Estonian grammar, the allative case indicates direction toward something or toward an abstract concept, and tegelusele is used when the action or orientation is aimed at the concept named by tegelus. Because tegelus can carry senses related to reality, fact, or a state of being (and in some contexts to acting or portraying), tegelusele often appears in philosophical, theoretical, or literary texts where authors discuss alignment with or toward a particular notion.
Morphologically, tegels is inflected within the Estonian noun paradigm to yield tegelusele for the allative. The
Usage and interpretation of tegelusele depend on context. In academic prose, it can serve to direct discussion
See also Estonian grammar, allative case, and noun inflection in Estonian.