IPA: /əˈstjuːtnəs/
KK: /əˈstutnəs/
The quality of being able to notice and understand things clearly and quickly, often in a clever way.
Her astuteness in business negotiations helped her secure a better deal.
Astuteness is derived from the root "astutus" (from Latin, meaning shrewd or clever) and the suffix "-ness" (meaning the state or quality of). The word describes the quality of being shrewd or having sharp insight.
Think of 'astutus' meaning clever, and remember that 'astuteness' refers to the quality of being clever or shrewd.