subspecialize

/sʌbˈspɛʃəlaɪz/
verb
  1. To focus on a specific area within a broader field of study or work.
    • Many lawyers subspecialize in intellectual property law to better serve tech companies.
    • The biologist chose to subspecialize in marine mammals rather than general ocean life.
    • After medical school, she decided to subspecialize in pediatric cardiology.
What does "subspecialize" mean? | whatsthatwordmean | whatsthatwordmean