specialize, specialise, narrow, narrow down -- (become more focus on an area of activity or field of study; "She specializes in Near Eastern history")
constrict, constringe, narrow -- (become tight or as if tight; "Her throat constricted")
Overview of adj narrow
The adj narrow has 5 senses
narrow -- (not wide; "a narrow bridge"; "a narrow line across the page")
narrow -- (limited in size or scope; "the narrow sense of a word")
narrow-minded, narrow -- (lacking tolerance or flexibility or breadth of view; "a brilliant but narrow-minded judge"; "narrow opinions")
narrow -- (very limited in degree; "won by a narrow margin"; "a narrow escape")
minute, narrow -- (characterized by painstaking care and detailed examination; "a minute inspection of the grounds"; "a narrow scrutiny"; "an exact and minute report")