gruellingadjective
mainly UK US usually grueling uk/ˈɡruː.ə.lɪŋ/us/ˈɡruː.ə.lɪŋ/extremely tiring and difficult, and demanding great effort and determination:
Junior doctors often have to work a gruelling 100-hour week.
He eventually won the match after five gruelling sets.
Thesaurus: synonyms and related words
Complicated and difficult to do
- advanced
- ambitious
- another
- arduous
- as much as you can do idiom
- fiddly
- fiendish
- fierce
- formidable
- get blood out of/from a stone idiom
- murky
- picnic
- problematic
- punishing
- rigorous
- schlep
- uphill
- vexed
- wearing
- wearying
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gruellingly
adverb US gruelingly uk/ˈɡruː.ə.lɪŋ.li/us/ˈɡruː.ə.lɪŋ.li/