unremitting

un|re|mit|ting /'ʌnrɪm'ɪtɪŋ/
[ADJ] usu ADJ n
Something that is unremitting continues without stopping or becoming less intense. (FORMAL)
I was sent to boarding school, where I spent six years of unremitting misery...
He watched her with unremitting attention.
● unremittingly [ADV] usu ADV adj
The weather was unremittingly awful.