This is the 7589th most frequent Spanish word.
k
In Spanish, "k" is not a word but rather the name of the letter "k" in the alphabet, often used informally to replace "que" (meaning "what" or "that").
In this sentence, 'que' is used as a conjunction to connect clauses.
Creo que mañana lloverá.
I think it will rain tomorrow.
Here, 'que' (spelled 'qué' when indicating 'why') is used as an interrogative question word.
¿Por qué no vienes a la reunión mañana?
Why don't you come to the meeting tomorrow?
Here, 'que' acts as a conjunction, introducing a subordinate clause.