Attach vs Bind vs Fasten vs Secure

When to use each in English, with meaning, register, and examples.

Attach

Top 1,000 (very common)B1verb

Bind

Top 2,000 (common)C1verb

Fasten

Top 3,000 (common)B1verb

Secure

Top 1,000 (very common)B2verb
 AttachBindFastenSecure
Pronunciation🇬🇧 /["/əˈtætʃ/","/əˈtætʃɪz/","/əˈtætʃt/","/əˈtætʃɪŋ/"]/🇺🇸 /["/əˈtætʃ/","/əˈtætʃɪz/","/əˈtætʃt/","/əˈtætʃɪŋ/"]/🇬🇧 /["/baɪnd/","/baɪndz/","/baʊnd/","/ˈbaɪndɪŋ/"]/🇺🇸 /["/baɪnd/","/baɪndz/","/baʊnd/","/ˈbaɪndɪŋ/"]/🇬🇧 /["/ˈfɑːsn/","/ˈfɑːsnz/","/ˈfɑːsnd/","/ˈfɑːsnɪŋ/"]/🇺🇸 /["/ˈfæsn/","/ˈfæsnz/","/ˈfæsnd/","/ˈfæsnɪŋ/"]/🇬🇧 /["/sɪˈkjʊə(r)/","/sɪˈkjʊəz/","/sɪˈkjʊəd/","/sɪˈkjʊərɪŋ/"]/🇺🇸 /["/sɪˈkjʊr/","/sɪˈkjʊrz/","/sɪˈkjʊrd/","/sɪˈkjʊrɪŋ/"]/
Meaningto connect or fasten something to another thingto tie or fasten things togetherTo make something secure or tight.To make safe or protect something.
ExamplePlease attach the document to your email before sending it.The agreement will bind both parties to the contract.Please fasten your seatbelt before the flight.We need to secure the doors before we leave for the night.
RegisterNeutralNeutralNeutralNeutral
How commonTop 1,000 (very common)Top 2,000 (common)Top 3,000 (common)Top 1,000 (very common)
CEFR levelB1C1B1B2
Part of speechverbverbverbverb
Collocationsfirmly, securely, loosely, totightly, loosely, together, to, with, bind and gag somebody, bind somebody hand and foot, contractually, legally, morally, be beautifully bound, be handsomely bound, be richly bound, contractually, legally, morallyfirmly, properly, securely, to, firmly, properly, securely, to, firmly, properly, securely, to, firmly, properly, securely, toeasily, safely, eventually, be able to, manage to, fail to, an attempt to secure something, an effort to secure something, be aimed at securing something, firmly, properly, tightly, to, with
Antonymsdetach, removeunbind, loosen, releaseloosen, unfastendanger, unsecure, risk
Common mistakesConfused with 'detach' – forgetting to use the right prefix., Using 'attaching' incorrectly in passive constructions., Not following with an object, e.g., 'attach to' instead of 'attach the document to'.Confusing 'bind' with 'bond' — 'bond' usually implies a relationship., Using 'bind' incorrectly in a figurative sense without clear context., Forget to use the appropriate preposition when indicating what is being bound.Confusing 'fasten' with 'loosen'., Using 'fasten' without an object, e.g., saying 'I need to fasten.' instead of 'I need to fasten my seatbelt.', Mixing up 'fasten' with other similar verbs like 'attach' or 'secure'.Confused with 'ensure' - 'ensure' means to make sure something happens., Using 'secured' as an adjective when it should be a verb., Misplacing the emphasis on the second syllable.
Usage notesUse 'attach' for both physical and abstract connections, like emails or documents. Less common in very formal writing. Avoid with informal language unless using slang.Use 'bind' in contexts where something is physically tied or metaphorically connected. It's suitable for both formal and informal contexts but can feel technical in legal or academic texts.Use 'fasten' when you want to describe securing something, like a seatbelt or a button. It's appropriate in most contexts.Used to indicate making something safe, but can also mean to obtain or achieve something. More common in formal contexts when referring to safety and in neutral situations for obtaining.

See it in real clips

Bind
Secure

Frequently asked questions: Attach vs Bind vs Fasten vs Secure

What's the difference between Attach, Bind, Fasten, and Secure?

Attach: to connect or fasten something to another thing Bind: to tie or fasten things together Fasten: To make something secure or tight. Secure: To make safe or protect something.

Which is more advanced: Attach, Bind, Fasten, and Secure?

Bind is the highest level, at C1, on the CEFR scale.

Are Attach, Bind, Fasten, and Secure the same CEFR level?

Attach: B1, Bind: C1, Fasten: B1, Secure: B2 on the CEFR scale.

What part of speech are Attach, Bind, Fasten, and Secure?

Attach: verb, Bind: verb, Fasten: verb, Secure: verb.

Can you show an example of each?

Attach: Please attach the document to your email before sending it. Bind: The agreement will bind both parties to the contract. Fasten: Please fasten your seatbelt before the flight. Secure: We need to secure the doors before we leave for the night.

Can I use Attach, Bind, Fasten, and Secure interchangeably?

Not always. Attach, Bind, Fasten, and Secure are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.

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