ふりょく浮力furyoku
1.
The upward force experienced by an object submerged in a fluid, which acts in opposition to gravity, equal to the weight of the fluid displaced by the object.
2.
The pressure exerted by a fluid that pushes an object upwards when it is partially or fully immersed, allowing it to float or rise.
Example:
塩水の方が淡水よりも浮力が大きい。