challenging

[ chal-in-jing ]
/ ˈtʃæl ɪn dʒɪŋ /

adjective

offering a challenge; testing one's ability, endurance, etc: a challenging course; a challenging game.
stimulating, interesting, and thought-provoking: a challenging suggestion.
provocative; intriguing: a challenging smile.

Origin of challenging

1300–50; Middle English, as gerund; 1835–45 for def 1; see challenge, -ing2

Related forms

chal·leng·ing·ly, adverbnon·chal·leng·ing, adjectiveun·chal·leng·ing, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for un-challenging

challenging

/ (ˈtʃælɪndʒɪŋ) /

adjective

demanding or stimulatinga challenging new job
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012