# undertow

/ˈəndɝˌtoʊ/ (US) · /ˌʌndətˈəʊ/ (UK) · CEFR C1 · Noun

Source: https://englishreference.com/word/undertow
Updated: 2026-09-29

## Definition

a strong current of water that pulls away from the shore, moving underneath the surface waves. It can also mean a hidden feeling or mood that is different from what people show on the outside.

For teachers: a subsurface current that flows in a different direction from the surface water, particularly one moving seaward after a wave breaks on a beach. In a figurative sense, it refers to an underlying feeling or tendency that runs counter to the apparent atmosphere.

## Examples

- The strong undertow makes swimming dangerous today.
- Swimmers were warned to stay close to the shore because the powerful undertow could pull them into deeper water.
- Despite the celebratory nature of the event, a dark undertow of resentment was palpable among the staff who had been passed over for promotions.

## Usage notes

- Often used with the definite article 'the' when referring to the physical current.

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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.