Container vs Sack

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

Container

Top 2,000 (common)B1noun

Sack

Top 2,000 (common)C1verb
 ContainerSack
Pronunciation🇬🇧 /["/kənˈteɪnə(r)/"]/🇺🇸 /["/kənˈteɪnər/"]/🇬🇧 /["/sæk/","/sæks/","/sækt/","/ˈsækɪŋ/"]/🇺🇸 /["/sæk/","/sæks/","/sækt/","/ˈsækɪŋ/"]/
MeaningA box or other object used to hold things.A large bag made of strong material, used for holding things.
ExampleThe package arrived in a large container that was difficult to open.She was sacked for refusing to work on Sundays.
RegisterNeutralNeutral
How commonTop 2,000 (common)Top 2,000 (common)
CEFR levelB1C1
Part of speechnounverb
Collocationsairtight, closed, sealed, fill, store something in, contain something, hold something, garden, plant, in a/​the container, container for, container of, empty, full, bulk, contain something, hold something, lorry, ship, portsack of potatoes, sleeping sack, sack race, grain sack
Antonymssource, origin, emptinesshire, employ, recruit
Common mistakes'Container' is sometimes confused with 'content' - remember, 'container' holds things, 'content' is what is inside., Some learners use 'conteneer' instead of 'container' due to phonetic similarities., It's often mistakenly pluralized as 'containerss'.Confused with 'sack' as a verb (to dismiss someone) and as a noun (the bag)., Using 'sack' in overly formal writing., Using 'sack' to refer to small bags (should use 'purse' or 'bag').
Usage notesUsed in everyday contexts, 'container' fits well in both casual and professional speech. It may not be suitable for very formal writing where more specific terms like 'receptacle' might be preferred.Used in contexts involving storage or carrying items. Not typically used in formal contexts. 'Sack' can also refer to being fired from a job, which is informal.

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Container

Frequently asked questions: Container vs Sack

What's the difference between Container and Sack?

Container: A box or other object used to hold things. Sack: A large bag made of strong material, used for holding things.

Which is more advanced: Container and Sack?

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

Are Container and Sack the same CEFR level?

Container: B1, Sack: C1 on the CEFR scale.

What part of speech are Container and Sack?

Container: noun, Sack: verb.

Can you show an example of each?

Container: The package arrived in a large container that was difficult to open. Sack: She was sacked for refusing to work on Sundays.

Can I use Container and Sack interchangeably?

Not always. Container and Sack 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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