1 PHRASAL VERB (身体某部分因紧张或上了年纪而)发僵，无法动弹 If a part of your body seizes up, it suddenly stops working, because you have strained it or because you are getting old. (身体某部分因紧张或上了年纪而)发僵，无法动弹
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After two days' exertions, it's the arms and hands that seize up, not the legs. [VERB PREP.]
两天的辛苦劳累过后，发僵的是胳膊和双手，腿倒没事。
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We are all born flexible but as we grow older, we tend to seize up a little. [VERB PREP.]
我们刚生下来时身体都很灵活，但随着年龄的增长，手脚会变得有些僵硬。
2 PHRASAL VERB (发动机等)停止运转，发生故障 If something such as an engine seizes up, it stops working, because it has not been properly cared for. (发动机等)停止运转，发生故障
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She put diesel fuel, instead of petrol, into the tank causing the motor to seize up. [VERB PREP.]
她往油箱里加了些柴油而不是汽油，致使发动机发生故障。