IPA: /ˈɡruː.əl.ɪŋ/
KK: /ˈɡruː.əl.ɪŋ/
Very difficult and tiring, often causing exhaustion.
The marathon was a gruelling test of endurance for all the runners.
Comparative: more gruelling
Superlative: most gruelling
Gruelling originates from the verb 'gruel', which comes from the Old French 'gruau' (meaning oatmeal or porridge). The suffix '-ing' indicates the action or process. Thus, 'gruelling' refers to something that is as exhausting or laborious as the process of making or consuming gruel, which is often associated with hardship.
Think of the exhausting process of making or eating gruel, which is a simple, laborious food. This helps you remember that 'gruelling' describes something that is very tiring or demanding.