This is the 488th most frequent Estonian word.
kel
The Estonian word "kel" means "who" or "whom."
Here, 'kellega' (a form of 'kel') is an interrogative pronoun used to enquire about the company or person involved in an action.
Kellega sa lähed teatrisse?
With whom are you going to the theater?
In this sentence, 'kel' is used as a relative pronoun that introduces a conditional clause regarding possession.
Kel on koer, see teab, kui ustavad nad on.
Who has a dog, knows how loyal they are.
In this sentence, 'kel' acts similarly to the relative pronoun 'who,' introducing a descriptive clause.