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Prepositions after adjectives

Impractical for or impractical in?

Impractical for is the main pattern when describing unsuitable people, purposes, or situations. Impractical in is used for contexts or areas.

Quick answer

Choosing between for and in

Use impractical for when something is unsuitable for a person, purpose, or activity. Use impractical in when referring to a context, field, or situation.

The design is impractical for daily use.
Cash payments are impractical in remote areas.
The schedule was impractical for students.

Choose the pattern by meaning

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

1
impractical for + purpose/person

Showing something is unsuitable

Use for with people, activities, or intended uses.

The boots are impractical for hiking.
The plan proved impractical for small businesses.
2
impractical in + context

Referring to a setting or environment

Use in for fields, situations, places, or conditions.

The rule is impractical in emergencies.
Paper maps are impractical in heavy rain.
3
impractical to + verb

Describing actions that are not realistic

Use to before a verb when an action is unrealistic or inconvenient.

It is impractical to commute from that village.
It became impractical to continue the project.

See the difference in context

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

Construction
Example
Meaning
impractical for
The device is impractical for travel.
Standard pattern for intended use or affected people.
impractical in
The system is impractical in large classrooms.
Used for contexts or situations.
impractical to
It is impractical to print every document.
Used before a verb.
impractical with
The table is impractical with limited space.
With introduces a condition, not a fixed adjective pattern.

Common mistakes

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

Using in for a purpose

Use for when talking about intended use.

✕ This bag is impractical in travel. ✓ This bag is impractical for travel.

Forgetting the context after in

In usually introduces a setting or situation.

✕ The policy is impractical in. ✓ The policy is impractical in rural areas.

Using impractical before a verb without to

Use to before the verb.

✕ It is impractical continue. ✓ It is impractical to continue.

Quick practice

Choose the expression that matches the intended meaning.

1. The software is impractical ___ beginners.
2. The rule seems impractical ___ emergencies.
3. It became impractical ___ maintain two offices.

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Frequently asked questions

Is impractical for more common than impractical in?

Impractical for is the usual pattern for people and purposes, while impractical in refers to contexts or situations.

Can I say impractical to?

Yes. Impractical to + verb is natural when discussing actions.

Is impractical with correct?

It can appear when with introduces a condition, but it is not the main adjective pattern.

ideal-for-in-as-at, from "identical to" or "identical with"? identifiable by, as, with, in or to? "idle for" or "idle in"? ignorant of, about, to, in or on? "illegal in" or "illegal for"? illustrative of, in, rather or for? ill with, in, for, at or of? "immune to" or "immune from"? "impatient with" or "impatient for"? "imperative for" or "imperative to"? impervious to, from or in?

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