obtuse

Obtuse is a related term of cretinous.

As adjectives the difference between obtuse and cretinous

is that obtuse is blunt; not sharp while cretinous is characteristic of a cretin; very stupid.

As adjectives the difference between obtuse and inert

is that obtuse is blunt; not sharp while inert is unable to move or act; inanimate.

As a noun inert is

(chemistry) a substance that does not react chemically.

As adjectives the difference between obtuse and fatuous

is that obtuse is blunt; not sharp while fatuous is obnoxiously stupid, vacantly silly, content in one's foolishness.

As adjectives the difference between obtuse and opaque

is that obtuse is blunt; not sharp while opaque is neither reflecting nor emitting light.

As a noun opaque is

an area of darkness; a place or region with no light.

As a verb opaque is

to make, render (more) opaque.

As adjectives the difference between torpid and obtuse

is that torpid is unmoving, dormant or hibernating while obtuse is blunt; not sharp.

As adjectives the difference between obtuse and obtuser

is that obtuse is blunt; not sharp while obtuser is (obtuse).

As a noun taxonomy

is the science or the technique used to make a classification.

As an adjective obtuse is

blunt; not sharp.

As adjectives the difference between piano and obtuse

is that piano is soft, quiet while obtuse is blunt; not sharp.

As a noun piano

is a keyboard musical instrument, usually ranging over seven octaves, with white and black keys, played by pressing these keys, causing hammers to strike strings.

As an adverb piano

is softly, as a musical direction (abbreviated to p. in sheet music).