1. narrow
2. constricting, constrictive, narrowing, narrowed, slender, thin, strait, straplike, tapered, tapering, narrowing, limited, narrow-minded, thin, limited
3. narrow-minded
4. close-minded, closed-minded, dogmatic, dogmatical, illiberal, intolerant, opinionated, opinionative, self-opinionated, petty, small-minded, narrow
5. bare, marginal, minute

1. careful, strait

1. sound, contract
2. change, narrow down, narrow down, pin down
3. peg down, nail down, narrow down, specify, determine, specialize
4. specialise, narrow down, change, alter, vary, constrict
4. constringe, tighten