应急 yìngjí to respond to an emergency
to respond to an emergency; to meet a contingency; (attributive) emergency
How to remember 应急: 应 should + 急 urgent = to respond to an emergency.
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How it is used
- To meet an emergency; (attributive) emergency - 应急预案 (yìngjí yù'àn) an emergency plan; 应急灯 (yìngjí dēng) an emergency light.
- The 应 = respond, 急 = urgent; it's about readiness for sudden needs, often used as a modifier.
- Read yìng (fourth tone, 'to respond'); common in safety and contingency contexts.