constraint
/kənˈstreɪnt/noun
1- a limitation or restriction限制; 约束, 束缚, 局限：
the availability of water is the main constraint on food production
供水是限制食品生产的主要问题
mass noun remove any clips to allow the pipe to expand without constraint.把所有夹子都取下来, 以使管子能不受限制地膨胀。
1.1
- mass noun stiffness of manner and inhibition in relations between people压抑, 抑制; 克制; 拘束：
they would be able to talk without constraint.
他们可以毫无拘束地谈话。
词源
late Middle English （in the sense 'coercion'）： from Old French constreinte, feminine past participle of constraindre （see CONSTRAIN）.