upstarting

/ʌpˈstɑrtɪŋ/
adjective
  1. Suddenly rising to prominence or importance, often in a way that seems presumptuous or aggressive.
    • The upstarting company quickly grabbed market share from established brands.
    • The upstarting politician challenged the longtime mayor in the debate.
    • Her upstarting attitude annoyed the older members of the committee.
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Antonyms
noun
  1. A person who has recently risen to a position of power or importance, especially one who is seen as presumptuous or aggressive.
    • He was dismissed as an upstarting by the senior partners.
    • The old guard viewed the young entrepreneur as an upstarting.
    • Every industry has its upstarts who shake up the status quo.
Antonyms
What does "upstarting" mean? | whatsthatwordmean | whatsthatwordmean