约束

to restrict / to limit to / to constrain / restriction / constraint

to weigh in a balance or on a scale

to make an appointment / to invite / approximately / pact / treaty / to economize / to restrict / to reduce (a fraction) / concise

to bind / bunch / bundle / classifier for bunches, bundles, beams of light etc / to control

(of a contract) binding (law)

legal force (i.e. binding in law)

restricted / constrained

restrictive condition / constraint