expectancy
noun [ U ] uk/ɪkˈspek.tən.si/ us/ɪkˈspek.tən.si/
（对令人激动或愉快的事情的）期待，渴望，盼望
the feeling that something exciting or pleasant is going to happen
There was a general air of expectancy in the crowd. 人群中弥漫着期盼的气氛。
See also: life expectancy