Assuming you mean "high" as in "large or extreme" ("high temperature", "high value"), you have several choices: Hyper- (popular in Medicine, for example "hyperkalaemia" is a high level of potassium in the blood) Super/supra- (tends to be used comparatively - something that is higher than something else - "supermodel" being one up from a "model", or "supraorbital ridge" being the ridge of bone that is above the orbit (eye socket)). Ultra- (tends to indicate something at the maximum degree - "ultra-fast" would mean something like "in the fastest category", not necessarily the very fastest but certainly in the same category as the very fastest.) There are also several prefixes used in the SI system of units - kilo, mega, tera, etc. - which are ways of indicating a large or high value. If you meant "high" as in "at a great height above the ground", I'm not sure I can think of a prefix for that! "Acro-" as in "acrophobia", fear of heights? "Aero-?"
There is no prefix on the word "high." A prefix is an added part to the beginning of the main word, such as unanswered, the "un" is the prefix.
hyper. Like in hyperthermia (too high body temperature) or hyperglycemia (too high blood sugar).
The prefix meaning "high" is ALTI
Cirrus
Upper
A common prefix of speed is high, as in high-speed internet.
In Latin, the prefix Alto- means 'high' for clouds like Altocumulus, and Altostratus.
The prefix cirro means clouds at a high altitude.
In Latin, the prefix Alto- means 'high' for clouds like Altocumulus, and Altostratus.
High, deep.
The cloud prefix that means "high" is "cirro-." Clouds that have this prefix are located high in the sky and are usually wispy in appearance.
High
A common prefix of speed is high, as in high-speed internet.
In Latin, the prefix Alto- means 'high' for clouds like Altocumulus, and Altostratus.
The prefix cirro means clouds at a high altitude.
In Latin, the prefix Alto- means 'high' for clouds like Altocumulus, and Altostratus.
High, deep.
Hyper- which means High
Clouds at high altitude use the prefix cirro while clouds at middle altitude use the prefix alto. I know this is not in the question but clouds at low altitude don't use any specific prefix. I am also in love with Arturo B.
hyper.The prefix that means excessive or above is hyper as in hypertension, which is high blood pressure.
The mid-altitude clouds are given the prefix, "Alto." Alto means high. These clouds are between 6000 and 20,000 feet. There is no prefix meaning middle for clouds.
The prefix sub- means under. For instance a submarine is "under water".