Devote oneself to a special area of work.

synoniem: specialize.

Be specific about.

synoniemen: particularise, particularize, specialize, specify.

Nederlands: specificatie, specificeren, verbijzonderen

Suit to a special purpose.

synoniem: specialize.

Become more focused on an area of activity or field of study.

synoniemen: narrow, narrow down, specialize.

Evolve so as to lead to a new species or develop in a way most suited to the environment.

synoniemen: differentiate, specialize, speciate.