Limpid
Limpid (lim"pid) , adjective
[Latin limpidus; akin to Greek la`mpein to shine: compare French limpide. Compare Lamp.]
1.
Characterized by clearness or transparency; clear; as, a limpid stream.
Springs which were clear, fresh, and limpid.
2.
Clear and unambiguous; lucid; easy to understand; -- of speech and writing; as, limpid prose.
3.
Calm, untroubled, and without worry; serene.