This is the 189th most frequent Dutch word.
daarom
"Daarom" means "therefore" or "that's why."
In this sentence, 'daarom' emphasizes the cause-effect relationship between his practice and winning.
Hij heeft veel geoefend; daarom heeft hij de wedstrijd gewonnen.
He practiced a lot; that's why he won the competition.
This sentence uses 'daarom' to provide a reasoning for being late.
Ik was te druk bezig, daarom kon ik niet op tijd komen.
I was too busy, that's why I couldn't arrive on time.
Here, 'daarom' is used as a conjunctive adverb to explain the consequence of why they are staying at home.