pore over

read or study something very carefully for a long time (a book, document)

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What does "pore over sth" mean?

To pore over something means to give it your complete, sustained attention — reading or examining every detail with great care. It suggests not just a quick look, but an absorbed, often lengthy effort to understand or extract information from something. The object is almost always a physical or visual thing: a document, a map, a set of data, a manuscript, or a photograph. The verb carries a sense of intellectual intensity, and sentences using it frequently include time expressions like 'for hours' or 'all night' to reinforce how demanding this scrutiny is. It sits naturally in formal, academic, journalistic, and literary contexts — in casual speech, most people would say 'go through' or 'look at' instead.

Examples

How to use it

pore over + object

The standard pattern — the object always follows 'over' and must be something that can be physically or visually examined.

The legal team pored over every clause in the agreement before advising their client.

pore over + object + time expression

A time expression is frequently added to emphasise the sustained, prolonged nature of the scrutiny.

She pored over the research findings for weeks before drawing any conclusions.

pore over + it / them

Pronouns are always placed after 'over', never between 'pore' and 'over'.

The historian received the letters on Monday and has been poring over them ever since.

spend time poring over + object

This gerund construction with 'spend' highlights the investment of time and effort involved in the activity.

The analysts spent the entire afternoon poring over the quarterly figures.

Common Collocations

documentsdataa mapthe evidencethe detailsa contract

Common Mistakes

Wrong spelling: 'pour over'

'Pour' refers to moving a liquid — it is a completely different word. The correct spelling is 'pore over', from an archaic word meaning to gaze intently. This is one of the most common errors with this phrase, even among proficient writers.

✗ She spent the evening pouring over the manuscript.
✓ She spent the evening poring over the manuscript.
Using an abstract object

'Pore over' requires an object that can be physically or visually examined — a document, data, a photograph, and so on. It cannot be used with abstract ideas or emotions; use 'ponder' or 'reflect on' for those.

✗ He pored over the concept of justice for his thesis.
✓ He pored over the philosophical texts on justice for his thesis.
Passive construction

Because 'over' is a preposition introducing the object, a passive transformation is not grammatical. Avoid passive forms with this phrasal verb.

✗ The documents were pored over by the investigators.
✓ The investigators pored over the documents.

Usage

This phrasal verb is more formal and written than everyday alternatives like 'go over' or 'look at'. It often appears in academic, journalistic, and literary contexts to emphasise intense, prolonged reading or examination.

Frequently Asked Questions

Can 'pore over' be used in the passive?

No — 'pore over' cannot be naturally used in the passive, because 'over' is a preposition rather than part of a separable verb structure. Constructions like 'the documents were pored over' do occasionally appear, but careful writers avoid them as they sound unnatural.

Does 'pore over' always imply that something took a long time?

It strongly suggests sustained, absorbed effort rather than a quick glance. While you can technically use it without a time reference, adding one — 'for hours', 'all night', 'for years' — makes the sentence sound much more natural and captures the verb's full meaning.

Is 'pore over' a formal expression?

It leans towards formal and written language — it appears frequently in academic writing, journalism, legal contexts, and literary prose. In everyday conversation, most speakers would use 'go through' or 'look at' instead. Using 'pore over' in casual speech is not wrong, but it can sound slightly bookish.

The word 'pore' seems unusual — is it used anywhere else in English?

Almost never in modern English. The verb 'pore' meaning to gaze intently is effectively fossilised in this one phrase. You are very unlikely to encounter it in any other construction, which is one reason the spelling confusion with 'pour' is so persistent.

What kinds of objects can follow 'pore over'?

The object should be something that can be physically read, looked at, or visually examined — documents, maps, data, manuscripts, reports, contracts, photographs, blueprints, and similar materials all work naturally. Abstract concepts like 'an idea' or 'a feeling' do not fit this verb.

Related Phrasal Verbs

go sth over
look sth over

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