relight       
verb [ I or T ] uk/ˌriːˈlaɪt/ us/ˌriːˈlaɪt/ relit or relighted | relit or relighted
 再次燃烧;再次点燃;重新照亮
to begin to burn again; to make something begin to burn again
  If no gas leak is detected, relight your heater. 如果没有发现煤气泄漏,重新点燃加热器。 
 - More examples
 - A failure to relight suggests a blocked jet, which needs cleaning and adjusting.
 - I just relit the furnace after waiting 3.5 hours for a plumber who still hasn't shown up.
 - He had been trying to relight the firework after it had failed to go off at a public display.
 - Castro explained that you never relight a cigar. When it goes out, you throw it away.