Adjective
formidable
IPA /fəˈmɪdəbl/
Strong, impressive or difficult enough to make people feel respect, concern or fear.
See example sentence: formidable
Organising the entire family reunion proved a formidable challenge.
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Adjective
daunting
IPA /ˈdɔːntɪŋ/
Seeming so difficult or demanding that it makes someone feel nervous about trying it.
See example sentence: daunting
Cooking dinner for twelve guests felt daunting at first.
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