implacable voice

[jacdac]

Crazy, her dead father’s implacable voice tolled in her head. Crazy with the heat. You come on over here, ’Becka Bouchard, I’m gonna beat you three shades of blister-blue for that crazy talk.
Source: The atom myknockers by Stephen King

Does implacable voice = angry voice?

Thank you

 

[dermott]

Did you try the WR dictionary? Implacable:

impossible to placate; not to be pacified or stopped:

Her father's voice inside her head was relentless, unstoppable.