Sentence:  Thus , for aqueous media , we can think of the idealized organic active as an oleophilic or hydrophobic surface-active agent , and of an idealized builder as a oleophobic or <WSD>hydrophilic</WSD> surface-active agent . 
Meaning of the word marked with <WSD> tags:  having a strong affinity for water; tending to dissolve in, mix with, or be wetted by water