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English definition of “underlie”

underlie

verb [T]     /ˌʌn.dəˈlaɪ/ US  /-dɚ-/ (present participle underlying, past tense underlay, past participle underlain)
to be a hidden cause of or strong influence on something: Psychological problems very often underlie apparently physical disorders.Being based on or depending on something
(Definition of underlie verb from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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