This is the 6344th most frequent Catalan word.
ned
"ned" means "he/she swims" (third person singular of "nedar").
In this sentence, 'nedar' is used as an infinitive following 'après,' indicating the action learned.
La nena ha après a nedar aquesta setmana.
The girl learned to swim this week.
The word 'nedava' is the conjugated form of the verb 'nedar' in the imperfect tense, denoting a habitual or past continuous action of swimming.
Ell nedava al riu cada estiu.
He swam in the river every summer.
Here, 'nedar' is used in its infinitive form to describe the general action of swimming.