This is the 1201st most frequent Arabic word.
لذا
"لذا" means "therefore" or "thus."
The word 'لذا' is used here to indicate a reason for an action, emphasizing a cause-and-effect relationship.
لقد بدأت السماء تمطر، لذا أحضرت مظلتي.
The sky started to rain, so I brought my umbrella.
In this sentence, 'لذا' serves to connect the importance of studying with the suggested action of trying hard.
الدراسة مهمة جدا، لذا يجب أن تبذل قصارى جهدك فيها.
Studying is very important, so you should put your best effort into it.
Here, 'لذا' is used to connect the lengthy road to the consequent need for rest, showing a logical conclusion.