Volatile (adjective)
غیر مستحکم، بدلتے مزاج والا
(of a substance) easily evaporated at normal temperatures.
Example: “volatile solvents such as petroleum ether, hexane, and benzene”
Endeavour (verb)
جدوجہد، کوشش کرنا
try hard to do or achieve something.
Example: “he is endeavouring to help the Third World”