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to pin down

to pin down

20 3.5
To make something exact, like a date or reason
  • phrasal verb
  • /pɪn daʊn/
translation icon : precisar
  • In the meeting, we need to pin down the final details of the project before we proceed.
  • difficult to pin down
  • hard to pin down
  • impossible to pin down

So now let's ask how that pins down the number of firms in the market.

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Examples

  • The detective worked hard to pin down the suspect's whereabouts on the night of the crime.

  • The more I learned about other states, the harder it was to pin down the essence of mine.

    Academic text (2001)
  • Really trying to pin down those those big questions.

  • And the other concept that I wanted to pin down was was rent.

  • And each time it's been quite difficult to pin down an answer.

  • So it helps us to pin down where certain processes could have possibly happened.

  • So unless we pin down what happened, we're encouraging these bad actors.

  • You need to pin down an object of study, a first principle from which other principles can emerge.

  • Unfortunately, the precise content of these background rules is surprisingly difficult to pin down.

    Academic text (2017)
  • Instead, the project speaks to an inability to pin down the photograph's specific "social and cultural uses."

    Academic text (2010)

Synonyms

to narrow down
vsto pin down
129 3.5

Make a list of choices smaller until only a few remain

is broader, meaning make something precise rather than only cut options
to pinpoint
vsto pin down
123 4.0

To find the exact place or cause of something

is more general, meaning define or make certain rather than only locate exactly
to specify
vsto pin down
118 3.5

To give clear, exact details about something

is broader, covering any way to make something precise beyond listing details
to nail
vsto pin down
78 6.0

To find exactly when or why something happened

shares exactness but also covers broader defining and specifying uses
to put one's finger on
vsto pin down
35 5.6

Find the exact reason for something hard to explain

is more general, used for clear definition whether or not it is elusive
to nail down
vsto pin down
20 4.6

Decide the exact details of a plan or agreement

is more general, meaning make something precise or certain rather than finalize
to peg down
vsto pin down
  • Informal
5.3

To make exact details clear and certain

is about making things precise or certain without stressing finalization

How Precise

to specify
118 3.5
to define
878 1.0
to pin down
20 3.5
to identify
1.8
to describe
1.0

Surface Forms

pin down infinitive
pinning down present participle
pins down third person singular
pinned down past participle

Morphology

pin + down

The sense 'to attach ... with a pin, making it stay in a fixed position' is directly derivable from combining 'pin' (to hold/fasten) with 'down' (indicating fixation or securing). This verb+particle composition follows a transparent, cross-linguistic pattern so a B1 learner who knows the constituents would readily infer the intended literal meaning.

Etymology

Pin down comes from the image of sticking a pin into a map or paper to mark an exact spot or date. That simple act makes the idea fixed and clear, which is why the phrase means 'to clearly define or identify'.