Prepositions after adjectives

Irresponsible for or irresponsible of?

Use irresponsible for when talking about duties, actions, or consequences. Irresponsible of is generally not idiomatic in current English.

Quick answer

Correct construction

Use irresponsible for to describe responsibility connected to actions, people, money, safety, or outcomes. Do not normally use irresponsible of.

He was irresponsible for leaving the gate open.
The company is irresponsible for the data breach.
It would be irresponsible for parents to ignore the warning.

Choose the pattern by meaning

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

1
irresponsible for + action

Which action shows poor judgment?

Use irresponsible for followed by a noun or gerund describing the action.

She was criticized for being irresponsible for wasting public funds.
It was irresponsible for him to drive without insurance.
2
irresponsible for + consequence

Who caused a negative result?

Use irresponsible for to connect a person or organization with harmful results.

The factory was irresponsible for the pollution.
Officials were irresponsible for the delay.
3
irresponsible with + thing

What does someone handle badly?

With is often used to describe careless handling of money, information, or authority.

He is irresponsible with money.
The manager was irresponsible with customer data.

See the difference in context

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

Construction
Example
Meaning
irresponsible for
She was irresponsible for ignoring the safety rules.
Correct pattern showing a careless action or responsibility.
irresponsible of
It was irresponsible of him to spread false information.
This structure is possible only in the pattern it is irresponsible of someone to do something.
irresponsible with
He is irresponsible with company equipment.
Shows careless handling of something.

Common mistakes

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

Using irresponsible of directly before a noun

Do not use irresponsible of as a normal adjective-preposition combination.

✕ He is irresponsible of the project. ✓ He is irresponsible for the project.

Confusing irresponsible for with responsible for

Irresponsible describes careless behaviour, while responsible for can simply mean having duty or control.

✕ She is irresponsible for managing the team. ✓ She is responsible for managing the team.

Omitting the preposition

Irresponsible usually needs for or with depending on the meaning.

✕ The company was irresponsible the accident. ✓ The company was irresponsible for the accident.

Quick practice

Choose the expression that matches the intended meaning.

1. The driver was irresponsible ___ texting while driving.
2. He is irresponsible ___ money.
3. It was irresponsible ___ her to ignore the report.

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Frequently asked questions

Is irresponsible of ever correct?

Yes, in the structure it is irresponsible of someone to do something.

Can irresponsible for describe a consequence?

Yes. You can say a person or company was irresponsible for damage, delays, or losses.

What is the difference between irresponsible for and irresponsible with?

Irresponsible for refers to actions or outcomes, while irresponsible with refers to careless handling of something.

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