/ˌʌn·dərˈlɑɪ/v[T](present participleunderlying, past tenseunderlay/ˌʌn·dərˈleɪ/, past participleunderlain/ˌʌn·dərˈleɪn/)
Definition
›to be a cause of or strong influence on something: More fundamental economic problems may underlie last week’s stock market slide.Note: said esp. of a hidden cause or influence