Let down and Slowing down

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

Slowing down and let down are semantically related In some cases you can replace term "Slowing down" with "Let down", this phrasal verbs are similar.

Let down and slowing down are semantically related in idle topic. Sometimes you can use "Let down" instead a verb "Slowing down", if it concerns topics such as lazy.