| narrow(verb, restrict) |
| specialize |
| specialise |
| die down(verb, expression, phrasal verb, drop, cut) |
| nail down |
| pin down |
| abate(verb, drop, quiet, cut, decline) |
| calm down(verb, expression, phrasal verb, drop, cut) |
| check(verb, drop, quiet, cut, decline) |
| contract(verb, drop, quiet, cut, decline) |
| crumble(verb, drop, quiet, cut, decline) |
| curb(verb, drop, quiet, cut, decline) |
| curtail(verb, drop, quiet, cut, decline) |
| cut down(verb, expression, phrasal verb, drop, cut) |
| decay(verb, drop, quiet, cut, decline) |
| degenerate(verb, drop, quiet, cut, decline) |
| depreciate(verb, drop, quiet, cut, decline) |
| deteriorate(verb, drop, quiet, cut, decline) |
| devaluate(verb, drop, quiet, cut, decline) |
| diminish(verb, drop, quiet, cut, decline) |