This is the 5584th most frequent Arabic word.
فسيكون
"فسيكون" means "and it will be" in English.
The sentence uses "فسيكون" to indicate a future assurance that follows the condition of studying well.
إذا درست جيدًا، فسيكون نجاحك مضمونًا.
If you study well, your success will be guaranteed.
Here, "فسيكون" introduces a consequence in the future that results from the action of missing the bus.
إذا تأخرت عن الحافلة، فسيكون عليك انتظار الحافلة التالية.
If you miss the bus, you will have to wait for the next one.
In this sentence, "فسيكون" is used to describe the future state of the weather based on the condition of heavy rain.