It's not an idiom because it means just what it looks like - someone is very cold. In this context, you would think of the alternate meaning of cold, which is unemotional or unapproachable. When you see "as ___ as ___" or "___er than ___" you are dealing with a simile.
It can mean to eat a huge amount, more than you normally would.
The idiom for 'larger than life' is "a force of nature."
I don't know if's jupiter is hotter or colder than eath
Meaning you are pretending to be bigger or smarter than you really are
This is not an idiom. The idiom is "her BARK is worse than her bite" which is a dog reference meaning that she and the dog make a lot of noise but aren't really dangerous. This sentence seems to mean that she has an injured shoulder which is worse than a bite that she also has.
Its cold...
Much colder - the mean temperature of Io is 110 Kelvin - about 160 below zero Fahrenheit.
together mean something different than when they are used separately
Think about this and you can figure it out. An idiom is something that SEEMS to mean something totally different than what it does. Does this phrase mean exactly what it says? Yes, it means that someone is as pretty as a princess. If you see the words "like" or "as" or "than" you're looking at a simile.
Many things can be colder than ice; since hell has not been explored like many other regions, we do not know its mean temperature and cannot determine what is and is not warmer than it.
I don't know what you mean by "common phrases of," but the idiom "over and above" just means "more than what was agreed upon."
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