Gruelling is a alternative form of grueling.
As adjectives the difference between grueling and gruelling
is that grueling is an alternative spelling of lang=en while gruelling is so difficult or taxing as to make one exhausted; backbreaking.
gruelling
English
Alternative forms
* grueling
Adjective
(
en adjective)
So difficult or taxing as to make one exhausted; backbreaking.
Synonyms
* (so difficult or taxing as to make one exhausted) backbreaking, exhausting