# deepest

/ˈdipəst/ (US) · /dˈiːpəst/ (UK) · CEFR A2 · Adjective

Source: https://englishreference.com/word/deepest
Updated: 2026-05-02

## Definition

the most extreme level of something that goes far down or far inside. You use it to describe the part of a hole, a feeling, or a secret that is the furthest from the surface.

For teachers: the superlative form of 'deep', indicating the maximum extent downward, inward, or in intensity. Often describes physical distance from a surface or the most profound degree of an emotion or thought.

## Examples

- The divers explored the deepest part of the lake.
- She shared her deepest fears with her best friend during their long walk home.
- The probe was designed to withstand the immense pressure found in the deepest trenches of the Pacific Ocean, where sunlight never reaches the seafloor.

## Pitfalls

- Not "the most deep part" but "the deepest part" — One-syllable adjectives like 'deep' form the superlative by adding '-est' rather than using 'most'.

## Usage notes

- Superlative form of 'deep'; typically preceded by the definite article 'the'.

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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.