obtuse
The adjective obtuse is good for describing someone slow on the uptake: "Don't be so obtuse: get with the program!"
The adjective obtuse literally means "rounded" or "blunt," but when it's used for a person, it means "not quick or alert in perception" — in other words, not the sharpest tool in the shed. It's not just for dull people, but also dull angles: in geometry, an obtuse angle is one that is not so sharp (between 90 and 180 degrees).
Definitions of obtuse
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of an angle; between 90 and 180 degrees
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Antonyms:
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acute
of an angle; less than 90 degrees
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acute
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lacking in insight or discernment“too obtuse to grasp the implications of his behavior”
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synonyms:
purblind
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undiscerning
lacking discernment
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undiscerning
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slow to learn or understand; lacking intellectual acuity
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(of a leaf shape) rounded at the apex
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Synonyms:
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simple, unsubdivided
(botany) of leaf shapes; of leaves having no divisions or subdivisions
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simple, unsubdivided
Word Family
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