Irredeemable and Sinister

Irredeemable adjective - Not capable of being cured or reformed.

Sinister and irredeemable are semantically related. in hopeless topic. In some cases you can use "Sinister" instead an adjective "Irredeemable", when it comes to topics like futile.

Sinister adjective - Being or showing a sign of evil or calamity to come.

Irredeemable and sinister are semantically related. Sometimes you can use "Irredeemable" instead an adjective "Sinister".