limpid
adjective
[ ˈlɪmpɪd ]
• (of a liquid) completely clear and transparent.
• "the limpid waters of the Caribbean"
Similar:
clear,
transparent,
glassy,
glasslike,
crystal clear,
crystalline,
see-through,
translucent,
pellucid,
unclouded,
uncloudy,
Origin:
late Middle English: from Latin limpidus ; perhaps related to lymph.