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Prepositions after adjectives

Lax in, on, or about?

Lax commonly takes in, on, and about. The choice depends on whether you describe an area of behaviour, a rule, or a general topic.

Quick answer

Choosing the right preposition with lax

Use lax in for behaviour or performance in an area. Use lax on with rules, standards, or enforcement. Use lax about for a topic or responsibility someone does not treat seriously.

The manager was lax in enforcing safety rules.
The school is lax on attendance.
He is lax about deadlines.

Choose the pattern by meaning

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

1
lax in + activity/area

Describing weak performance or attention

Use in for an area where someone lacks strictness or care.

The company was lax in checking records.
She became lax in her studies during the summer.
2
lax on + rule/topic

Describing weak rules or enforcement

Use on with regulations, standards, discipline, or policies.

The city is lax on parking violations.
Parents should not be lax on internet safety.
3
lax about + subject

Describing a careless attitude

Use about for topics or responsibilities treated too casually.

He is lax about hygiene.
They were lax about security procedures.

See the difference in context

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

Construction
Example
Meaning
lax in
The staff became lax in following procedures.
Standard for behaviour or performance within an area.
lax on
The teacher is lax on homework deadlines.
Standard for rules, standards, or enforcement.
lax about
She is lax about household chores.
Standard for a general attitude toward a topic.
lax with
The coach was lax with discipline.
Possible in context, but less directly tied to lax than lax on discipline.

Common mistakes

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

Using on for personal habits

About is more natural for personal attitudes and habits.

✕ He is lax on his diet. ✓ He is lax about his diet.

Using in before a rule

Use on when referring to rules or enforcement.

✕ The school is lax in attendance policies. ✓ The school is lax on attendance policies.

Using about for an activity area

Use in for areas of work or behaviour.

✕ The company was lax about checking records. ✓ The company was lax in checking records.

Confusing meaning with relaxed

Lax usually means not strict enough, not calm or comfortable.

✓ The supervisor was lax on safety inspections.

Quick practice

Choose the expression that matches the intended meaning.

1. The agency has been too lax ___ data protection.
2. The referee was lax ___ enforcing the rules.
3. The school is too lax ___ discipline.

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Frequently asked questions

Is lax on correct English?

Yes. Lax on is common for rules, standards, and enforcement.

What is the difference between lax in and lax about?

Lax in focuses on performance or behaviour in an area. Lax about focuses on attitude toward a topic.

Can I say lax with?

Sometimes. Lax with someone or something can appear in context, but lax on and lax about are usually more direct and natural.

labour-in-for-with-on, to "large in" or "large of"? "late in" or "late for"? lawful for, to, in, unto or under? lazy in, about, with, to or for? "leading to" or "leading of"? leery of, about or over? left in, for, over, with or to? leftover from, of, for, in or after? "legal in" or "legal for"? "legitimate for" or "legitimate in"? lesser of, in, for, on or to?

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