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Prepositions after reliable

“Reliable in” or “reliable for”?

Reliable for is common when describing purpose or use. Reliable in appears with areas or situations where someone performs consistently.

Quick answer

Reliable in or reliable for?

Use reliable for to describe what something or someone can be trusted to do. Use reliable in before an area or situation where reliability is shown.

This laptop is reliable for everyday work.
She is reliable in emergencies.
The service is reliable for international shipping.

Choose the pattern by meaning

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

1
reliable for + purpose

Suitable or dependable for a use

For introduces the purpose, task, or function.

The software is reliable for large databases.
He is reliable for meeting deadlines.
2
reliable in + situation

Dependable within a context

In introduces the area or circumstances where reliability appears.

She remains reliable in stressful situations.
3
reliable with + object

Handling something consistently

With can describe skill or dependable handling.

He is reliable with sensitive data.

See the difference in context

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

Construction
Example
Meaning
reliable for
This engine is reliable for long trips.
standard for purpose or intended use
reliable in
She is reliable in difficult negotiations.
standard for contexts or situations
reliable at
He is reliable at work.
at introduces a place or activity, not a direct complement
reliable with
They are reliable with customer records.
describes dependable handling of something

Common mistakes

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

Using in for purpose

For is better when talking about intended use.

✕ This tool is reliable in heavy construction. ✓ This tool is reliable for heavy construction.

Using for with a general situation

In fits contexts or conditions.

✕ She is reliable for emergencies. ✓ She is reliable in emergencies.

Forgetting the noun after for

Reliable for should usually be followed by a purpose or activity.

✕ The device is reliable for. ✓ The device is reliable for remote work.

Quick practice

Choose the expression that matches the intended meaning.

1. This phone is reliable ___ travel.
2. She is reliable ___ difficult situations.
3. The accountant is reliable ___ financial records.

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Frequently asked questions

Is reliable for correct?

Yes. It is common when describing what something can be trusted to do.

When do we use reliable in?

Use reliable in before situations, fields, or conditions such as reliable in emergencies.

Can reliable describe people and objects?

Yes. People, services, machines, and systems can all be described as reliable.

racist-in-against-for-to, towards "radical in" or "radical for"? rampant in, among, with, on or throughout? "rare in" or "rare for"? "rational for" or "rational in"? "raw in", "raw for" or "raw with"? reachable by, from, on, in or through? "reactive to", "reactive rather" or "reactive in"? ready for, to, in, at or by? "realistic about" or "realistic in"? "real to", "real for" or "real in"? rearing of, as or on?

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