Easily frightened and Weak-kneed

Weak-kneed and easily frightened are semantically related. In some cases you can use "Weak-kneed" instead an adjective phrase "Easily frightened".

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

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