overspecialize

Verb (usu participle)

o=ver=spe=cial=ize

WORDNET DICTIONARY

overspecialize(v = verb.change) overspecialise - become overly specialized; "She overspecialized when she concentrated on verbs in Fijian"

is one way to narrow, narrow down, specialise, specialize

Sample sentences:
Something ----s
Somebody ----s
Something is ----ing PP
Somebody ----s PP

overspecialize, v.intr. (also -ise) concentrate too much on one aspect or area.

Derivative

overspecialization n.

For further exploring for "overspecialize" in Webster Dictionary Online