PDF chapter test TRY NOW

Find the correct meaning of the words from the options given below:
 
Casualty
Brother-in-law
Austere
Erstwhile
Ancestral
Erupt
Inherited
Luxury
Undistinguished
Ideal
Innate
Island
 
1. Something that happened previous to an event =
 
2. A person or thing regarded as perfect =
 
3. To break out suddenly =
 
4. Someone who has married one's sister =