unsoftened (?.)

• callous
• hard
• hardened
• impenitent
• insolent
• obdurate
• unabated
• unabject
• unallayed
• uncontrite
• unextinguished
• unmelted
• unmitigated
• unquelled
• unquenched
• unrepentant
• unrepenting
• unsubdued
• untempered
• untouched