it means that their booty goes up and down
it has a high buoyancy level
Buoyancy is the ability to float, so if the density is high, it'll hold up something. (see? FLOATING. BUOYANCY.)
High buoyancy=easy to float
Elevation is the term for how high something is above sea level.
High level disinfection is when something is disinfected very well where there are no germs left.
Sea level is a standard 'height' from which you can measure the relative height of objects (ie. cities) as such, high above sea level would refer to something 1,000+ metres above sea level... or whatever definition you think appropriate.
you have high blood sugar... get that checked
Usually means a parasitic infection most common is whip worm. Can be something more serious though.
It is the degree of the level of a poison or toxin in something. Such as: The well water has a high toxicity level.
High anxiety means that a person has a high level of stress and worry.
its a top level in that sport
You must be on like, level 20 or something REALLY high level