treeningusse
Treeningusse is the illative form of the Estonian noun treening, which means training. In Estonian grammar, the illative case indicates direction into something, such as entering a place or state. Treeningusse specifically denotes moving into or joining a training period or program.
Etymology and form: Treening comes from the word for training, and the illative suffix -usse is added
Usage: Treeningusse is used in sports, coaching, and educational contexts to describe entering a training program
Nuances: Treeningusse is a directional/locative expression rather than a standalone concept. It is not typically capitalized