蠟燭

candle / CL:根[gen1],支[zhi1]

candle / wax

candle / (literary) to illuminate

Wrightia tinctoria (flowering plant in Apocynaceae family, common names dyer's oleander or pala indigo)

some people have to be pushed for them to take action

to burn the candle at both ends (idiom) / to labor under a double burden