Surface tension is the energy, or work, required to increase the surface area  of a liquid due to intermolecular forces. Since these intermolecular forces vary depending on the nature of the liquid (e.g. water vs. gasoline) or solutes in the liquid (e.g. surfactants like detergent), each solution exhibits differing surface tension properties.  Higher suface tension means it is more difficult to break the surface.

물은 hydrogen bond 때문에 

surface tension이 매우 큰데요, surface 을 break 해서 surface arrea을  increase 하기가 더 어려워진다는 뜻입니다. 

Surface tension is the tendency of liquid surfaces to shrink into the minimum surface area possible

수고하세요.. ^^