underlie
Concise Oxford English Dictionary © 2008 Oxford University Press:
underlie/ʌndəˈlʌɪ/
▶verb (underlies, underlying; past underlay; past part. underlain)
- 1 lie or be situated under.
- 2 (often as adj. underlying) be the cause or basis of.
'underlie' also found in these Oxford entries:

