WordNet sense 1 (keep under control; keep in check):

keep, suppress, hold back, keep back

WordNet sense 2 (to compel or deter by or as if by threats):

intimidate

WordNet sense 3 (to close within bounds, limit or hold back from movement):

confine, hold

WordNet sense 4 (hold back):

constrain, cumber, encumber

WordNet sense 5 (place limits on (extent or access)):

bound, limit, restrict, throttle, trammel