constrain
verb.
compel to behave in a certain way
Social relations impose courtesy|duty constrains one to act often contrary to one's desires or inclinations
Synonym: enforce, impose
verb.
to close within bounds, or otherwise limit or deprive of free movement
This holds the local until the express passengers change trains|About a dozen animals were held inside the stockade|The illegal immigrants were held at a detention center|The terrorists held the journalists for ransom
Synonym: confine, hold, restrain
verb.
severely restrict in scope or extent
tighten the rules|stiffen the regulations