English Reference
adjective

obtuse

adj.
US /ɑbˈtus/ UK /ɒbtjˈuːs/ ob·tuse

  1. 01 B2 Upper Intermediate

    used to describe someone who is slow to understand something, or who is being deliberately difficult.

    lacking quickness of perception or intellect; characterized by a lack of sensitivity or insight.

    Simple

    I am not trying to be obtuse, but I really do not understand your point.

    In context

    The manager was being deliberately obtuse during the meeting, pretending not to follow the logic of the budget cuts to avoid taking responsibility.

    dullinsensitiveslow witted
  2. 02 B1 Intermediate Math

    an angle that is more than 90 degrees but less than 180 degrees.

    denoting an angle between 90 and 180 degrees; not acute or right-angled.

    Simple

    The roof of the house was built at an obtuse angle to help the snow slide off.

    In context

    The architect utilised a series of obtuse angles in the building's footprint to maximise the available floor space on the irregular lot.

  3. 03 C1 Advanced Technical Science

    having a blunt or rounded end rather than a sharp point.

    terminating in a rounded or blunt shape; not pointed or acute.

    Simple

    The leaves of this plant are easy to identify because they have obtuse tips.

    In context

    The specimen was distinguished by its obtuse leaf apex, a characteristic feature that separates it from other species in the same genus.

  4. 04 C2 Proficiency Literary

    a sound that is not clear or sharp; a dull or quiet sound.

    referring to a sound that is deadened, muffled, or lacking in resonance.

    Simple

    From behind the heavy curtains, we heard the obtuse thud of something falling.

    In context

    The obtuse echoes of the city traffic were barely audible through the thick stone walls of the ancient monastery.

    muffleddeadenedmuted

From Middle English obtuse, from Latin obtūsus (“blunt, dull; obtuse”), past participle of obtundere, from obtundō (“to batter, beat, strike; to blunt, dull”), from ob- (“against”) (see ob-) + tundō (“to beat, strike; to bruise, crush, pound”) (ultimately from Proto-Indo-European (s)tewd-, from (s)tew- (“to hit; to push”)). More at obtund.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Origin ine-pro *(s)tewd-
Level C2 · Proficiency
Frequency Occasional
Updated