specialize

verb

1.
become more focused on an area of activity or field of study
Antonym:
diversify
Exemplifies:
American spelling
3.
suit to a special purpose
Derived from:
specialization
Exemplifies:
American spelling
4.
devote oneself to a special area of work
Exemplifies:
American spelling
5.
evolve so as to lead to a new species or develop in a way most suited to the environment
Derived from:
specialization
Exemplifies:
American spelling