Noah Webster
Obtuse
OBTU'SE, adjective [Latin obtusus, from obtundo, to beat against.]
1. Blunt; not pointed or acute. Applied to angles, it denotes one that is larger than a right angle, or more than ninety degrees.
2. Dull; not having acute sensibility; as obtuse senses.
3. Not sharp or shrill; dull; obscure; as obtuse sound.