English Reference
noun · verb

nutshell

n. · v.
US /ˈnətˌʃɛɫ/ UK /nˈʌtʃɛl/ nut·shell UK spelling nutshells

  1. 01 B2 Upper Intermediate

    n.the hard outer shell that covers the seed or kernel of a nut.

    n.the hard, protective outer layer of a nut.

    Simple

    She cracked the nutshell to get to the walnut inside.

    In context

    The forest floor was littered with broken nutshells, evidence of the squirrels' busy morning gathering food for the winter.

    shellhusk
  2. 02 B2 Upper Intermediate

    n.a very short and clear description of something, usually in the phrase 'in a nutshell'.

    n.a concise summary or the essential points of a matter, typically appearing within the idiomatic prepositional phrase 'in a nutshell'.

    Simple

    To put it in a nutshell, the company is losing money because of high costs.

    In context

    The CEO provided the year's performance in a nutshell, focusing only on the critical decline in market share and the proposed recovery plan.

  3. 03 C2 Proficiency Literary Nautical

    n.a very small boat, especially one that feels tiny compared to the big ocean.

    n.a small, light vessel; often used to emphasize the boat's vulnerability or small size relative to the sea.

    Simple

    Their tiny boat felt like a nutshell in the middle of the stormy Atlantic.

    In context

    The fisherman's nutshell of a boat was tossed violently by the gale, appearing dangerously fragile against the towering grey swells.

    dinghyskiff
  4. 04 C2 Proficiency Informal

    v.to give a very short summary of a long story or a difficult idea.

    v.to summarize or condense information into a brief form.

    Simple

    Can you nutshell the main points of the meeting for me?

    In context

    The editor asked the reporter to nutshell the complex legal ruling into a single paragraph for the morning edition.

That, to me, is class in a nutshell: two people can work equally hard and take the same gamble but one has a much bigger margin for error.

The Guardian· 9 Sept 2026

From Middle English notschelle, from Old English hnutsċiell, from Proto-West Germanic *hnutskallju, equivalent to nut + shell. Cognate with Saterland Frisian Nuteskele, Nuteskil (“nutshell”), Dutch notenschaal (“nutshell”), German Nussschale (“nutshell”).

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Origin gmw-pro *hnutskallju
Level B2 · Upper Intermediate
Frequency Frequent
Updated