grueling[gro̵̅o̅′liŋ, gro̵̅o̅′ə liŋ]
A tough and challenging bicycle ride that is very strenuous is an example of a ride that would be described as grueling.
Origin of gruelingpresent participle of obsolete verb gruel, to punish ; from gruel
(comparative more grueling, superlative most grueling)
- Alternative spelling of gruelling.