しつこく の訳語→ insistently keep naggingly narrowly pester stubbornly
仮借なく の訳語→ inexorable inexorably relentlessly
手きびしい の訳語→ attack blistering cruel scathing tough
辛辣な の訳語→ acerbic acrimonious biting corrosive cutting mercilessly mordant peppery piquant tacky ungenerous vitriolic waspish
徹底した の訳語→ absoluteness deadly resounding tremendous
非情 の訳語→ bestial pain unfeeling
容赦なく の訳語→ brutal harshly let-down profoundly remorselessly ruthlessly surely unmercifully