Yes. For sure........
No, it's an adjective, the adverb is fearlessly.
Dive in Fearlessly - 2013 was released on: USA: May 2013
fearlessly
fearlessly
hello
No, she offered her life fearlessly.
Yes, they were defeated on occasion, but always fought fearlessly.
Nothing, why should it concern them?
Yes, fearless is an adjective. Also, the adverb form of it would be 'fearlessly'.
Example:Kernel sentence:The man investigated the noise.Then:The tall, dark-haired man investigated the screeching noise.The tall, dark-haired man fearlessly investigated the screeching noise.The tall, dark-haired man from next door fearlessly investigated the screeching noise.The tall, dark-haired man from next door, who moved in yesterday, fearlessly investigated the screeching noise which was coming from the car.
He fearlessly led the colonists to victory at the battle of saratoga
I believe the word you are referring to is "intrepidly", which is the adverb form of "intrepid". It means fearlessly, daringly, or resolutely.