volatile

US /ˈvɑ:lətl/

UK /ˈvɒlətaɪl/

B2TOEIC
adj.AdjectiveAble to easily become a gas at a low temperature
This compound mixture is very volatile
adj.AdjectiveUnstable and likely to change suddenly/extremely
You should be careful with your money because the stock market can be very volatile when the economy is having problems

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