Count out and Let down

Count out verb - To prevent the participation, consideration, or inclusion of.

Let down and count out are semantically related. In some cases you can use "Let down" instead a verb "Count out".

Let down verb - To fall short in satisfying the expectation or hope of.

Count out and let down are semantically related. Sometimes you can replace term "Count out" with "Let down", this phrasal verbs are similar.