1
more complicated
1
time-consuming
0
abstruse
0
challenge
0
exigent
13 years ago|27 views|share |citing 
APASmart Define. (2013). child's play thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/child%27s_play/thesaurus/antonyms
ChicagoSmart Define. 2013. "child's play thesaurus" https://smartdefine.org/child%27s_play/thesaurus/antonyms (accessed September 30, 2026).
HarvardSmart Define 2013, child's play thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/child%27s_play/thesaurus/antonyms>.
MLASmart Define. "child's play thesaurus" 19 May 2013. Web. 30 September 2026. <https://smartdefine.org/child%27s_play/thesaurus/antonyms>