dull
Definition
lacking interest or excitement; not sharp or bright.
日本語 興味や感動がないこと、明るくはっきりしないこと
Example
"The lecture was so dull that half the class fell asleep."
lacking interest or excitement; not sharp or bright.
日本語 興味や感動がないこと、明るくはっきりしないこと
"The lecture was so dull that half the class fell asleep."