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lie behind

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phrasal verb [transitive]
Word Forms
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present tense
I/you/we/theylie behind
he/she/itlies behind
present participlelying behind
past tenselay behind
past participlelain behind
  1. lie behind something to be the real reason for a decision or action

    We'd like to know what lay behind her decision to change her will.

See also main entry: lie

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