hydro- words

'hydro- conneted with water
hydro-electricity水電
hydro-electric水力發電的
hydr0-plane水上滑艇
hydro-therapy水療法
hydro-ponics(n.)水培

hydraulic(a.)水力的，液壓的 hydrolic engineering水利工程

hydrate(v.)absorb water吸水，含水
de-hydrated(a.)脫水

'hy-giene(un.)衛生
personal hygene個人衛生
food hegiene食物衛生
hy'genienic(a.)

hymen/'haimn/(n.)處女膜
hymn/hIm/(n.)讚美詩、聖歌 hymn book讚美詩集

*information from Oxford dictonary 6th edition