specialize
     v 1: become more special; "We specialize in dried flowers" [syn:
          {specialise}, {narrow}, {narrow down}] [ant: {diversify},
           {diversify}]
     2: be specific about; "Could you please specify your criticism
        of my paper?" [syn: {specify}, {particularize}, {particularise},
         {specialise}] [ant: {generalize}]
     3: suit to a special purpose; "specialize one's research" [syn:
         {specialise}]
     4: devote oneself to a special area of work; "She specializes
        in honey bees"; "This plumber specialized in jacuzzis"
        [syn: {specialise}]
     5: evolve so as to lead to a new species or develop in a way
        most suited to the environment [syn: {speciate}, {differentiate},
         {specialise}]
Source: WordNet® 2.0