# inaccessible

/ˌɪnəkˈsɛsəbəɫ/ (US) · /ɪnɐksˈɛsəbəl/ (UK)

Source: https://englishreference.com/word/inaccessible
Updated: 2026-08-27

## Senses

### 1. physically out of reach

adjective · CEFR B2

impossible or very difficult to reach or get into.

For teachers: not capable of being reached, entered, or approached physically.

- The mountain village is inaccessible by car during the heavy winter snow.
- The remote island remains largely inaccessible to tourists due to the lack of a deep-water port and the treacherous surrounding reefs.

### 2. difficult to understand

adjective · CEFR C1 · Academic

very difficult to understand or appreciate, especially art or writing.

For teachers: difficult to understand, appreciate, or relate to, often due to complexity or an elitist style.

- Many students found the professor's latest book too inaccessible because of the technical language.
- Critics argued that the composer's later works were intellectually inaccessible to the general public, requiring a deep knowledge of music theory to enjoy.

### 3. a type of large number

noun · CEFR C2 · Technical

a special kind of very large number used in high-level mathematics.

For teachers: an uncountable regular limit cardinal number that cannot be reached from smaller cardinals using standard set-theoretic operations.

- The professor explained how an inaccessible cardinal functions within set theory.
- The existence of an inaccessible cardinal cannot be proved within the standard framework of Zermelo-Fraenkel set theory alone.

## Examples

- The remote mountain village is inaccessible during the winter.
- Because the elevator was broken, the top floor of the museum was inaccessible to visitors in wheelchairs.
- The philosopher's latest book was criticized for being unnecessarily inaccessible, using dense jargon that obscured rather than clarified the core arguments.

---

From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.