challenging
adjective
[ ˈtʃalɪn(d)ʒɪŋ ]
• testing one's abilities; demanding.
• "challenging and rewarding employment"
Similar:
demanding,
testing,
taxing,
exacting,
exigent,
searching,
stretching,
exciting,
stimulating,
inspiring,
energizing,
inspirational,
difficult,
tough,
hard,
heavy,
stiff,
formidable,
onerous,
arduous,
laborious,
burdensome,
strenuous,
gruelling,
challenge
verb
• dispute the truth or validity of.
• "it is possible to challenge the report's assumptions"
Similar:
question,
disagree with,
object to,
take exception to,
confront,
dispute,
take issue with,
protest against,
call into question,
demur about/against,
dissent from,
be a dissenter from,
• invite (someone) to engage in a contest.
• "he challenged one of my men to a duel"
• expose (the immune system) to pathogenic organisms or antigens.
Origin:
Middle English (in the senses ‘accusation’ and ‘accuse’): from Old French chalenge (noun), chalenger (verb), from Latin calumnia ‘calumny’, calumniari ‘calumniate’.
