Psyched out and Weak-kneed

Weak-kneed and psyched out are semantically related. In some cases you can use "Weak-kneed" instead an adjective "Psyched out".

Weak-kneed adjective - Lacking strength of will or character.

Psyched out and weak-kneed are semantically related. Sometimes you can use "Psyched out" instead an adjective phrase "Weak-kneed".