meaning: melt, dissolve
水溶性 == suiyousei == (noun) water-soluble
Left radical is a radical version of
'water'. Right radical 'contain' (容), here acting phonetically to
express 'full'. In Chinese this character means 'container of water'.
Its present meaning in Japanese may be the result of borrowing, or may
related to the idea of water dissolving things. Henshall
suggests taking the right radical as 'roof/house' and 'valley' (谷), and
mnemonic: 'House dissolves in valley full of water.'