Definition of unrelentingness in US English:

unrelentingness

noun

  • See unrelenting

    • ‘The entire film is like a well choreographed but under-edited Bollywood dance number: initially dazzling but eventually tiring in its unrelentingness.’
    • ‘The worry, the work, the unrelentingness of life with a kid like Annika: it's been a long 5 years.’
    • ‘The unrelentingness of the book is what's so captivating.’
    • ‘I think it was a combination of the 20-hour days you need at the beginning with the unrelentingness of finishing one crime and now here comes another.’
    • ‘But despite the good humour, or because of its unrelentingness perhaps, I began to tire of it part way through.’