Ill-famed and Weak-kneed

Ill-famed adjective - Known widely and usually unfavorably.

Weak-kneed and ill-famed are semantically related. In some cases you can use "Weak-kneed" instead an adjective phrase "Ill-famed".

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

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