"hydro" is not a noun, it is a prefix, usually to a noun or adjective and does not affect gender.
If it is a prefix to a noun, the new noun formed will have the same gender as the original noun. If it is a prefix to an adjective, the noun the adjective refers to will provide the gender.
"Hydroélectricité" for example is feminine, because "électricité" is feminine.
eau is feminineeau is feminine
The word "water" in French is "eau," which is feminine. Therefore, it is referred to as "la eau" in the singular form. In plural, it is "les eaux."
"Miracle water" or "water of miracles" may be English equivalents of the French phrase eau des merveilles.Specifically, the feminine noun eau means "water." The preposition de means "of." The feminine noun merveilles means "miracles."The pronunciation will be "oh dey mehr-vey" in French.
feminine, but uses the masculine definite pronoun "el", because it starts with stressed "a", then to avoid the ugly sound "la agua", we say: "el agua". The same rule is applied for nouns like "alma, hacha, águila, hada, ágata", etc. El agua es cristalina --- water is glassy
"Water of wonders" is an English equivalent of the French phrase eau des merveilles. The feminine phrase most famously references a perfume by Hermès of Paris, France. The pronunciation will be "o dey mer-vey" in French.
"eau" is pronounced "oh" in French.
Eau calme for the water body and eau plate for the non-carbonated drink are French equivalents of the English phrase "still water." The respective pronunciations of the feminine singular noun and adjective will be "o kalm" and "o plat" in French.
"eau". This is a feminine noun.eau (f.)
eau means water in French.
Eau It may appear a bit odd looking to a native English speaker, but it is a masculine noun. It is pronounced "Oh".
Eau is a French noun whose spelling begins with the letters "ea." The feminine singular noun translates as "water" in English. The pronunciation will be "o" in French.
Eau is French for water. Kind of funny when you realize that Eau de Toilette essentially means "Toilet Water." Fancy perfume!