This is the 434th most frequent German word.
entscheiden
"Entscheiden" means "to decide."
Here, 'entscheiden' is used reflexively as 'sich entscheiden', implying the act of choosing or reaching a decision.
Ich kann mich nicht entscheiden, welches Buch ich lesen soll.
I cannot decide which book to read.
In this case, 'entscheiden' is used transitively, indicating the act of making a decision about something.
Die Jury wird über den Gewinner des Wettbewerbs entscheiden.
The jury will decide on the winner of the competition.
'Entscheiden' here again uses the reflexive form 'sich entscheiden', expressing the necessity of making a choice among alternatives.