IPA: /əbˈtjuːs.nəs/
KK: /əbˈtusnəs/
The quality of being slow to understand or perceive things; a lack of sharpness in intellect or insight.
His obtuseness in understanding the problem frustrated his classmates.
Obtuseness → It is formed from "obtusus" (from Latin, meaning blunt or dull) and the suffix "-ness" (meaning the state or quality of). The word "obtuseness" refers to the quality of being blunt or dull, particularly in terms of intellect or perception.
Think of the word 'blunt' to remember that 'obtuseness' means a state of being dull or lacking sharpness, especially in understanding.