cues·ta 
(kwĕstə)
(kwĕstə)n.
A ridge with a gentle slope on one side and a cliff on the other.
[Spanish, from Latin costa, side; see kost- in the Appendix of Indo-European roots.]
- ill-use
- illusion
- illusional
- illusionary
- illusionism
- illusionist
- illusionistic
- illusionistically
- illusionless
- illusive
- illusively
- illusiveness
- illusory
- illustratable
- illustrate
- illustration
- illustrational
- illustrative
- illustratively
- illustrator
- illustrious
- illustriously
- illustriousness
- illuvial
- illuviate