headlong
adj. C1 Advanced US //ˈhɛdˌɫɔŋ// UK //hˈɛdlɒŋ// head·long
adj. happening very quickly and without thinking about the possible dangers. You use this to describe a rush into something that might be risky.
adj. characterised by a lack of caution or foresight; proceeding rapidly and recklessly. Often used to describe a plunge into a dangerous or difficult situation.
The company made a headlong rush into the new market.
The young couple made a headlong plunge into marriage without considering the financial challenges they would face.
The government's headlong pursuit of rapid industrialisation led to significant environmental degradation that would take decades to reverse.
From Middle English hedlong, alteration of hedling, heedling, hevedlynge (“headlong”), assimilated to long. More at headling.