None. Perhaps you meant "hydro". About 100 words have that root in them, things like hydroponics or hydro-plane, even anhydrous.
No word in the English language begins with hydor.
It means water, some examples... hydrophobic: water-hater hydrophilic: water-loving
it has no root word for the word bill
No, "sary" is not a root word in the English language. Root words are the base form of a word from which other words are derived.
Many English words do not have Spanish root words, such as:algebrabuttcowdirteggfatghosthairiglooJewishkhakilumpmostnextplumqueenracesiptickleupvastwitchxrayyodzoom
Root words can be at the front or back of a word.
Each root word has a meaning. Root words can tell you the basic meanings of words you haven't seen.
The root word is medi. This root word means half.
Adore does not have a root word but it is its self a root word for words like adorable
Words with the root care:caredcarefulcarefullycaringuncaring
Some words containing the root word "positive" are positivity, positively, positiveness, and positivist.
Decima is not a root word however deci is. Some words with this root word are decimal, decibar, decigram, etc.