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to sniff out

to sniff out

15 4.0
Find something by searching, often by smell
  • phrasal verb
  • /snɪf aʊt/
  • Informal
translation icon : detectar
  • Dogs that have been trained to sniff out infectious diseases.
  • the ability to sniff out

So we were sniffing out what was going to be needed.

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Examples

  • A recent study found that dogs can sniff out when humans are stressed, building off earlier research that found dogs might be able to tell when a person is happy or fearful.

  • There are so many watchdogs out there, sniffing out unethical practices among agents.

    Blog text (32)
  • See if we can sniff out anything suspicious.

  • The readers, I think, will sniff out good books, whatever the subject.

    Academic text (2010)
  • The U.S. forces that arrived in Haiti in 1994 brought dogs trained to sniff out weapons.

    Academic text (1996)
  • In traditional Search and Rescue work, trained search dogs sniff out missing people following each person's distinctive scent.

    Blog text (17)
  • I think, I think that especially teenagers, they can sniff out ulterior motives or if you're not being genuine.

  • The nostrils at the tip of their long beak enable the birds to sniff out soil-dwelling prey.

    Academic text (1993)
  • The specially trained dog can sniff out drugs that are hidden in the luggage.

  • Investigators used bloodhounds to sniff out evidence at the crime scene.

Synonyms

to pick up
vsto sniff out
2.6

To learn or notice something often by chance

usually involves an active search or sensory tracking
to smell
vsto sniff out
1.0

To notice a scent with your nose

is an active search to discover rather than simple perception
to detect
vsto sniff out
763 3.2

Find something that is hard to notice

adds a tactile scent or investigative search element to simple discovery
to discern
vsto sniff out
70 5.8

To notice something that is hard to see or hear

uses more direct sensory or searching action rather than careful judgment
to pick out
vsto sniff out
64 3.0

Notice a sound or sight among other things

focuses more on finding than on distinguishing within a group
to spy
vsto sniff out
40 3.1

To notice something suddenly or after looking for it

uses smell or active investigation rather than visual noticing
to get a whiff
vsto sniff out
11 4.7

Smell something briefly, often a strong scent

refers to actively seeking out or detecting rather than a quick notice
to scent
vsto sniff out
5 3.5

To use the sense of smell to find something, often by animals

is broader, including searching or investigating by any means
to catch a whiff
vsto sniff out
4 5.1

To notice a small smell of something for a short time

involves a fuller search to discover rather than a brief hint
to nose
vsto sniff out
3 5.0

To find something by sniffing around

is similar but also applies to more general searching methods
to snuff
vsto sniff out
  • Archaic
3 7.9

To smell something quickly to see what it is

is more about finding or detecting rather than casual curious smelling
to smell out
vsto sniff out
2 5.1

Find something hidden by noticing small signs

relies more on literal sensory or active searching rather than just intuition
to nose out
vsto sniff out
  • Informal
1 6.9

Find something after careful searching

adds a sensory sense emphasis that the linked concept may lack
to scent out
vsto sniff out
5.6

To find something by smell or by careful searching

includes that but also covers non-odor based investigation

Antonyms

1.0

Choose not to pay attention to someone or something

How Thorough

to uncover
243 3.5
to sniff out
  • Informal
15 4.0
to detect
763 3.2
to spot
576 2.1
to notice
1.0

Surface Forms

sniff out infinitive
sniffed out past participle
sniffing out present participle
sniffs out third person singular

Morphology

sniff + out

The sense 'to discover or detect' is motivated by the literal meanings of 'sniff' (to smell/search with the nose) and 'out' (to find or bring to light), so the connection is partly transparent. However, the extension to abstract or non-olfactory detection (e.g., investigating, uncovering facts) is metaphorical and may not be fully predictable to a B1 learner without prior exposure.

Etymology

Sniff out comes from the image of a dog using its nose to sniff and follow a smell out until it finds something hidden. That's why today it means 'to find' or 'discover' something by searching carefully.