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abstruse

abstruse

3 9.9
Hard to understand because it is very complex
  • adjective
  • /æbˈstruːs/
  • Formal
translation icon : abstruso
  • The book contains several abstruse theories that require advanced knowledge to comprehend.
  • abstruse subject

A lot of metaphysics is just the abstruse kind of moral philosophy.

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Examples

  • The few distinctive ideas the Chávez government has announced, meanwhile, are abstruse and probably unworkable.

    Academic text (2001)
  • His knowledge and contagious enthusiasm actually made me appreciate Shakespeare's abstruse phraseology.

  • And then their conversation would become so abstruse as to seem to be conducted in a foreign tongue.

    Fiction book (1995)
  • Their arguments got just as abstruse and sometimes just as heated, too.

    Fiction book (1999)
  • But for a book dealing with such abstruse material, it's surprisingly accessible.

    Blog text (18)
  • To many readers, these implications may seem strange or even abstruse, so they may well refuse to accept my thesis.

    Academic text (2004)
  • His concern was not with the earthy matters that troubled his sister; he dealt in abstruse issues, sometimes even beyond Malcolm's capacity to understand.

    Fiction book (1993)
  • Marxists, in voluminous and often abstruse polemics, have so far failed to define the term satisfactorily.

    Academic text (1991)
  • At sixteen, he made his way through Bertrand Russell and Alfred North Whitehead's famously abstruse masterpiece, Principia Mathematica.

    Blog text (16)
  • Many students find the professor's lectures on quantum physics to be abstruse and difficult to follow.

Synonyms

deep
vsabstruse
583 7.6

Hard to understand or explain

is less about depth alone and more about being obscure or puzzling
mysterious
vsabstruse
498 5.1

Hard to understand or explain because it seems strange

adds the idea of complex, technical obscurity rather than only mystery
indistinct
vsabstruse
328 5.3

Not easy to see, hear, or understand

refers more specifically to conceptual complexity rather than vague perception
confusing
vsabstruse
276 3.2

Hard to understand and makes people feel unsure

focuses more on dense, complex thought that resists easy clarity
elusive
vsabstruse
52 7.0

Hard to understand or describe, like the meaning of a symbol

is firmer, describing deliberate intellectual complexity rather than evasiveness
inexplicable
vsabstruse
47 7.8

Hard to explain or understand

includes hard to understand complexity even when explanation might exist
incomprehensible
vsabstruse
46 8.8

Difficult or impossible to understand

can include very hard complexity but not always absolute impossibility
obscure
vsabstruse
28 8.2

Hard to understand because it is unclear or complex

adds the idea of complexity and depth beyond mere lack of clarity
enigmatic
vsabstruse
27 8.1

Hard to understand and often seems mysterious

leans more toward difficult complex thought rather than only puzzling quality
unexplainable
vsabstruse
19 7.0

Something people cannot understand or find a clear reason for

covers complex, obscure reasons as well as unexplained phenomena
opaque
vsabstruse
14 8.0

Hard to understand or follow

also implies dense complexity rather than only unclear wording
impenetrable
vsabstruse
14 8.3

Very hard to understand

permits difficult but potentially solvable complexity rather than total blockage
inscrutable
vsabstruse
12 8.9

Hard to understand because it shows no clear meaning or feeling

allows for hard, complex understanding even when not fully impossible
hard to follow
vsabstruse
9 6.4

Difficult to understand

covers deeper obscurity and conceptual complexity beyond just sequence issues
recondite
vsabstruse
  • Formal
1 9.9

A subject that only a few people understand because it is hard to follow

is broader, meaning hard to understand without stressing learned obscurity
enigmatical
vsabstruse
1 9.3

Hard to understand, like a puzzle

is closer to technical or dense difficulty rather than mere puzzlement
ungraspable
vsabstruse
1 8.6

Difficult to understand even after thinking about it

is less absolute, allowing for deep but attainable understanding
nonlucid
vsabstruse
8.5

Difficult to understand

stresses complex ideas as the reason for difficulty rather than poor wording
umbrous
vsabstruse
  • Archaic
9.9

Hard to understand because it is mysterious and unclear

is more about intellectual complexity and dense difficulty than moodiness
Heraclitean
vsabstruse
  • Literature
9.9

Said or written in a puzzling, mysterious way

is a general label for difficult complex ideas beyond a single style
inapprehensible
vsabstruse
9.9

Hard to understand or explain

admits that ideas can be obscure yet still open to study and grasp
incognoscible
vsabstruse
  • Archaic
9.9

Not possible for people to know or understand

is narrower, pointing to difficulty that may still be studied or known

Antonyms

1.0

Easy to understand and not confusing

1.0

Easy to understand or do

1.0

Easy to see or understand

How Difficult

impenetrable
14 8.3
abstruse
  • Formal
3 9.9
complex
648 5.6
understandable
171 1.6
clear
1.0

Surface Forms

abstruse positive

Etymology

Abstruse comes from Latin parts ab- ('away') and trudere ('to push'), the same root you see in intrude ('to push in'). So an abstruse idea is like something pushed away or hidden, which is why it means 'difficult to understand'.