activate
/ˈæktɪveɪt; `æktəˌvet/ v[Tn]
1 make (sth) active 使（某事物）活动
The burglar alarm was activated by mistake. 防盗铃误响了.
2 (physics 物) make (sth) radioactive 使（某物）产生放射性.
3 (chemistry 化) make (a reaction) happen more quickly, eg by heat 使（反应）加快（如藉加热）; 使活化.