lay behind
C1 formal inseparable intransitive
In simple words
To be the real reason or cause of something, hidden beneath the surface.
Literal meaning: To be positioned 'behind' something — suggesting a hidden or less visible position that explains what is in front.
Meanings
1 C1
idiomatic
formal
To be the real, underlying reason or cause that explains something.
"Nobody could agree on what lay behind his sudden decision to resign."
Grammar: inseparable
Usage notes
Usage note: Careful speakers and writers prefer 'lie behind' for this sense, as 'lie' is the intransitive verb for being in a position. 'Lay behind' is encountered but may be regarded as an error. The meaning is the same: the hidden reason that explains something.
Commonly used with
decision motive success failure conflict choice
Forms
Base
lay behind
I/you/we/they
3rd person
lays behind
he/she/it
Past simple
laid behind
yesterday
Past participle
laid behind
have + pp
-ing form
laying behind
continuous
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Synonyms
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