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to sail under false colors

to sail under false colors

8.4
To pretend to be someone else to trick people
  • idiom
  • Informal
translation icon : navegar bajo falsas banderas
  • She sailed under false colors by pretending to be a fellow employee, which allowed her to access confidential files.

Examples

  • By sailing under false colors, he managed to get into the exclusive event without an invitation.

  • I have been sailing under false colors.

  • The spy was sailing under false colors to gather sensitive information from competitors.

Synonyms

to deceive
vsto sail under false colors
270 3.9

To make someone believe something that is not true to get an advantage

does this specifically by pretending to be another person or thing
to pose
vsto sail under false colors
172 6.1

To pretend to be someone you are not to trick people

often aims to gain a personal advantage when performing the deception
to masquerade
vsto sail under false colors
26 6.9

To pretend to be someone else to hide the truth

focuses on intentional deception often to gain an advantage rather than visible disguise
to pass off
vsto sail under false colors
18 6.9

To make something or someone look real when they are not

seeks to deceive by adopting a false identity usually for advantage
to pull the wool over someone's eyes
vsto sail under false colors
  • Informal
7 8.2

To trick someone by hiding the truth

focuses on pretending to be a different person or thing for advantage
to wear a disguise
vsto sail under false colors
5 3.9

To put on clothes or a mask to hide who you are

aims at deception to gain advantage not only physical disguise
to spoof
vsto sail under false colors
3 6.0

Pretend to be a person or website online to trick people

involves pretending to be another person or thing for personal gain
to sham
vsto sail under false colors
1 6.4

To pretend to be or feel something to trick people

focuses on pretending identity or role often to secure an advantage
to personate
vsto sail under false colors
1 9.9

Pretend to be another person to trick people or act in a role

is used more broadly for pretending to be people or things for advantage
to humbug
vsto sail under false colors
  • Archaic
1 8.7

To trick someone by pretending to be something they are not

usually aims to gain an advantage specifically through the false appearance
to play false
vsto sail under false colors
1 8.1

To trick someone who trusts you by hiding your real plans to get something for yourself

does deception by pretending to be someone or something to gain advantage

Antonyms

342 4.1

Reveal hidden facts or bad actions to people

How Deceptive

to sail under false colors
  • Informal
8.4
to pass off
18 6.9
to pretend
2.3

Surface Forms

Morphology

sail + under + false + color

The literal parts — 'sail' + 'under' + 'false' + 'colors' — describe the image of a ship sailing beneath fake flags, so a learner can plausibly infer a meaning related to deception. However, the specialized maritime sense of 'colors' = 'flag/identity' and the conventionalized extension to 'pretend to be someone/something else to gain advantage' are somewhat idiomatic and culturally specific, so the full meaning is not fully predictable without prior exposure.

Etymology

The idiom sail under false colors may come from old sailors who would sail showing another ship's flag as their colors to look friendly and hide what they really wanted. That's why it now means 'to deceive others by pretending to be someone else'.