nut
B1Neutral (for core meaning). Informal/Slang for extended meanings 2, 3, and 7.
Definition
Meaning
The dry, hard-shelled fruit of various plants (such as an almond or walnut), consisting of an edible kernel inside a woody shell that does not split open naturally.
The concept extends metaphorically to: 1) a small, often hexagonal, piece of metal with a threaded hole, used to screw onto a bolt; 2) (slang) a person's head; 3) (informal, often derogatory) an eccentric, obsessive, or crazy person; 4) the basic, essential details of a matter ('nuts and bolts'); 5) a source of pleasure or satisfaction; 6) the hard, central part of a fruit, such as a peach stone; 7) (vulgar slang) testicle.
Linguistics
Semantic Notes
The semantic field bridges concrete botany (seed), mechanical engineering (fastener), and colloquial/slang uses for people and concepts. The word is highly polysemous, with significant distance between its literal and metaphorical uses.
Dialectal Variation
British vs American Usage
Differences
Minimal for the core botanical and mechanical meanings. The derogatory slang term 'nutcase' is equally common. The vulgar slang meaning (testicle) is widely understood in both but perhaps slightly more common in AmE.
Connotations
Similar. 'Nuts' as an adjective meaning 'crazy' is common in both varieties. The phrase 'nuts and bolts' (fundamentals) is identical.
Frequency
The noun 'nut' (botanical/mechanical) is of identical high frequency. Colloquial uses are also similarly frequent.
Vocabulary
Collocations
Grammar
Valency Patterns
N of N (a nut of that tree)V + N (crack a nut, shell a nut)Adj + N (a hard nut)N + to-INF (He's a tough nut to crack)Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “a hard/tough nut to crack”
- “the nuts and bolts”
- “go nuts”
- “be nuts about something/someone”
- “off one's nut”
- “for nuts (UK, informal: not at all competently)”
Usage
Context Usage
Business
'We need to discuss the nuts and bolts of the merger.' (fundamentals)
Academic
The study analysed the nutritional profile of tree nuts.
Everyday
I'm allergic to nuts. / Can you pass me that nut? The bolt is loose.
Technical
Torque the flange nut to 50 Nm. / The drupe's endocarp forms a hard nut.
Examples
By Part of Speech
verb
British English
- He was nutting the ball with impressive skill during the football match.
- The squirrel was nutting away its winter store.
American English
- The soccer player nutted the ball into the goal. (Note: 'soccer' used for US context)
- He got nutted in the fight. (slang: headbutted)
adverb
British English
- He's playing nuttily, without any strategy.
American English
- She's driving nuts fast.
adjective
British English
- That's a completely nut idea, you must be joking.
- He's gone a bit nut after the incident.
American English
- Are you nuts? Don't touch that wire!
- It was a nuts plan from the start.
Examples
By CEFR Level
- I like to eat nuts.
- The squirrel has a nut.
- He's allergic to peanuts and tree nuts.
- Turn the nut clockwise to tighten it.
- My brother is a football nut.
- The manager is a tough nut to crack, but we need her approval.
- Let's move past the theory and get to the nuts and bolts of the proposal.
- This bolt is missing its corresponding nut.
- The prosecution's case was a hard nut to crack, with little forensic evidence available.
- His behaviour became increasingly erratic, leading many to believe he was going nuts.
Learning
Memory Aids
Mnemonic
Think of a squirrel holding a nut to its head – the nut is a 'hard' seed, and the squirrel might look a bit crazy (a 'nut').
Conceptual Metaphor
THE MIND/HEAD IS A NUT (a hard nut to crack, off his nut). A PROBLEM IS A NUT (a tough nut to crack). FUNDAMENTALS ARE MECHANICAL PARTS (nuts and bolts).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not translate 'nut' (mechanical) as 'гайка' in a botanical context. For food, use 'орех'.
- The idiom 'a tough nut to crack' is not directly translated; the Russian equivalent is 'трудная задача' or 'крепкий орешек'.
- The slang 'He's a nut' does NOT mean 'Он орех'. Use 'Он псих' or 'Он чудак'.
- 'Nuts' as an adjective ('That's nuts!') is 'безумие' or 'это бред', not 'орехи'.
Common Mistakes
- Using 'nut' to refer to a peanut (which is a legume, not a true botanical nut).
- Confusing 'nut' (food) with 'nut' (crazy person) in formal writing.
- Misspelling as 'nutt' in verb forms (e.g., 'he was nutting it down' is incorrect).
Practice
Quiz
In the sentence 'He's a real nut about vintage cars,' what does 'nut' mean?
FAQ
Frequently Asked Questions
No, botanically a peanut is a legume (like peas and beans), not a true nut. However, in common culinary language, it is often grouped with nuts.
A bolt is the threaded metal rod or pin. A nut is the small metal block with a threaded hole that screws onto the bolt to fasten things together.
Yes, it can be. Calling someone 'a nut' or 'nuts' to mean they are crazy is informal and often derogatory. It should be avoided in formal or polite contexts.
It's an idiom meaning the basic, practical details and essential workings of something, as opposed to the theory or big ideas.
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