sujumises
Sujumises is an Estonian grammatical form derived from the noun sujumine, which denotes the activity of swimming. In Estonian, sujumises is the inessive form and is used to express the idea of “in swimming” or “in the act of swimming.” It is a case-inflected form rather than a separate lexical item with a distinct meaning.
Morphology and usage: The inessive case marks location or context within which an action takes place. When
Linguistic notes: Sujumises serves as an example of how Estonian uses case endings to express relationships
See also: Estonian language, inessive case, sujumine, ujuma (to swim).