sol·u·ble 
(sŏlyə-bəl)
(sŏlyə-bəl)adj.
1. Capable of being dissolved, especially easily dissolved: soluble fats.
2. Possible to solve or explain: soluble mysteries.
[Middle English, from Old French, from Late Latin solūbilis, from Latin solvere, to loosen; see leu- in the Appendix of Indo-European roots.]
solu·ble·ness n.
solu·bly adv.