Implacable \im-PLAK-uh-bull\, adjective:

Not placable; not to be appeased; incapable of being pacified; inexorable; as, an implacable foe.

For it is my office to prosecute the guilty with implacable zeal.
— Paola Capriolo, Floria Tosca (translated by Liz Heron)

He… then continued on up the road, his shoulders bent beneath the implacable sun.
— Arturo PĂ©rez-Reverte, The Fencing Master

She conducted her life and her work with all the steady and implacable seriousness of a steamroller.
— “The Stein Salon Was The First Museum of Modern Art”, New York Times, December 1, 1968

Implacable ultimately comes from Latin implacabilis, from in-, not + placabilis, placable, from placo, placare, to soothe, calm, appease. Entry and Pronunciation for implacable

OK. Pandas R Teh Cute

What’s black and white and cute all over? Baby Panda link, of course!

Just to balance the cuteness, I present the creepy. Axe-murderer SpongeBob.

“NO!!! He’s behind that link!