A back fighter is somebody who fights from behind the scene. Someone who fights others but his identity is unknown. It also refers to somebody who is a pretender.
back fighter
The best meaning for dereliction is to neglect or be negligent, careless.
meaning the best
Khair-meaning best Wara-pious, Godfearing Khairulwara-best of the pious ones.
The meaning of the poem Do the Best of Whatever You Are is to take pride in your work. It doesn't matter what you do, if you do the very best you can at that job, then you can be proud of your work.
the best of the rest
forboding
It can kill you
the best,
Best friend
of Exonerate
Champion, best-of-the-best, to strive for excellence