水火不容

completely incompatible / lit. incompatible as fire and water

surname Shui

water / river / liquid / beverage / additional charges or income / (of clothes) classifier for number of washes

fire / urgent / ammunition / fiery or flaming / internal heat (Chinese medicine) / hot (popular) / classifier for military units (old) / Kangxi radical 86

no; not so / (bound form) not; un-

must not / cannot / to not allow / cannot tolerate

surname Rong

to hold / to contain / to allow / to tolerate / appearance / look / countenance