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Prepositions after adjectives

Using “steadfast” with prepositions

Steadfast is most commonly followed by in or to. Other prepositions may appear in wider sentence contexts but are less direct combinations.

Quick answer

Best prepositions with “steadfast”

Use steadfast in for beliefs, attitudes, or actions, and steadfast to for loyalty or commitment. On, with, and for usually introduce separate ideas rather than fixed adjective patterns.

She remained steadfast in her principles.
He is steadfast to his promise.
They stayed steadfast in supporting the project.

Choose the pattern by meaning

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

1
steadfast in + belief/action

Showing firmness in attitudes or behaviour

Use in before beliefs, values, or actions.

The team stayed steadfast in its support.
2
steadfast to + commitment/person

Showing loyalty or devotion

Use to for faithfulness to duties, promises, or people.

She remained steadfast to her friends.
3
steadfast for + cause

Expressing support for a cause

For may appear when the sentence focuses on support for something, though in is usually more natural with steadfast itself.

They were steadfast for equal rights.

See the difference in context

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

Construction
Example
Meaning
steadfast in
He was steadfast in his beliefs.
firm and consistent in attitudes or actions
steadfast to
She stayed steadfast to her ideals.
loyal or faithful to something
steadfast on
The committee remained steadfast on this issue.
on introduces the topic under discussion rather than a fixed adjective pattern
steadfast with
She was steadfast with her daily routine.
with introduces accompaniment or manner, not a common pattern
steadfast for
They remained steadfast for reform.
supporting a cause; less common than steadfast in support of

Common mistakes

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

Using “on” as the main pattern

On usually introduces a topic, not the object of steadfastness.

✕ He is steadfast on his loyalty. ✓ He is steadfast in his loyalty.

Confusing “in” and “to”

In focuses on beliefs or actions; to focuses on loyalty or commitment.

✕ She is steadfast in her friends. ✓ She is steadfast to her friends.

Overusing “with”

With is not the standard preposition after steadfast.

✕ They stayed steadfast with their values. ✓ They stayed steadfast in their values.

Quick practice

Choose the expression that matches the intended meaning.

1. She remained steadfast ___ her principles.
2. He stayed steadfast ___ his promise.
3. The group remained steadfast ___ reform.

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Frequently asked questions

Which is more common: steadfast in or steadfast to?

Both are standard, but they express slightly different meanings.

Can I say “steadfast on this issue”?

Yes, when on introduces the topic being discussed.

Is “steadfast with” natural?

It is possible in some contexts, but it is not the usual adjective pattern.

sacred-to-in-by-of, for "sad for" or "sad about"? "safe for", "safe from" or "safe in"? sanguine about, in, of, on or for? "satisfactory to" or "satisfactory for"? satisfied with, of, by, in or on? "satisfying for" or "satisfying to"? scarce in, for, at, on or of? scared of, to, about, for or by? "scary for" or "scary to"? "scathing about", "scathing in" or "scathing of"? "sceptical about" or "sceptical of"?

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