This is the 222nd most frequent Urdu word.
مسلسل
Continuous; constant; unbroken.
In this sentence, 'مسلسل' (musalsil) is used as an adverb meaning 'continuously' to indicate an unbroken sequence in the action of studying.
وہ مسلسل پڑھائی کر رہا تھا۔
He was studying continuously.
'مسلسل' (musalsil) in this context highlights the regular and continuous effort, acting as an adjective characterizing 'effort'.
اس نے مسلسل محنت کی اور کامیابی حاصل کی۔
She worked diligently and achieved success.
Here, 'مسلسل' (musalsil) is employed as an adjective describing 'sequence' to signify its unbroken and ongoing nature.