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Prepositions after adjectives

Usable for, usable in, or usable by?

Usable for describes a purpose, usable in refers to a context or environment, and usable by identifies the user.

Quick answer

Which preposition follows usable?

Use usable for to show purpose, usable in for a setting or system, and usable by for the person or group able to use something.

This tool is usable for small repairs.
The software is usable in most browsers.
The website is usable by children.

Choose the pattern by meaning

These forms are not interchangeable. Choose the construction by meaning, not by which preposition appears most often.

1
usable for + purpose

Describing function or purpose

For introduces the task or activity something can be used for.

The room is usable for meetings.
This fabric is usable for outdoor furniture.
2
usable in + context

Describing environments or systems

In refers to the situation, platform, or place where something works.

The app is usable in offline mode.
These materials are usable in cold climates.
3
usable by + user

Identifying users

By introduces the person or group who can use something.

The controls are usable by left-handed users.
The service is usable by international students.

See the difference in context

The same subject can take different constructions because each sentence answers a different question.

Construction
Example
Meaning
usable for
The knife is usable for camping trips.
suitable for a purpose
usable in
The device is usable in low light.
functional in a specific environment
usable by
The platform is usable by beginners.
accessible to a user group
usable with
The printer is usable with older computers.
with can be used for compatibility, although it was not part of the original query

Common mistakes

Some combinations appear in real text but do not mean what learners often assume.

Using for with users

For usually introduces purpose, not the user.

✕ The app is usable for children. ✓ The app is usable by children.

Using by for purpose

By refers to users or agents, not intended use.

✕ This tool is usable by cutting metal. ✓ This tool is usable for cutting metal.

Confusing in and for

In refers to a context or environment.

✕ The software is usable for most browsers. ✓ The software is usable in most browsers.

Quick practice

Choose the expression that matches the intended meaning.

1. The equipment is usable ___ underwater conditions.
2. This table is usable ___ both work and dining.
3. The interface is usable ___ older adults.

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Frequently asked questions

Can usable by describe accessibility?

Yes. It is common when discussing accessibility and user-friendly design.

Is usable in only for physical places?

No. It can also refer to systems, software, or situations.

Can I say usable for people?

Usually no. When referring to users, usable by is more natural.

ubiquitous in, on, across, throughout or for? "ugly in", "ugly for" or "ugly of"? ultimate in, of, for, on or as? "unacceptable to", "unacceptable in" or "unacceptable for"? unaccounted for unaccustomed to or in? unacquainted with unaffected by, in, for or with? "unaffordable for" or "unaffordable to"? unanimous in, on, about, regarding or for? "unattractive to" or "unattractive for"? "unavailable for" or "unavailable to"?

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