B2 verb /ˈspɛʃəˌlaɪz/
specialize
विशेषज्ञता हासिल करना
Meaning
to focus on a particular subject or activity and become an expert in it
Example
He decided to specialize in cardiology.
उसने कार्डियोलॉजी में विशेषज्ञता हासिल करने का निर्णय लिया।