1 : singularly evil or productive of evil. 2 : accompanied by or leading to disaster. 3 : presaging ill fortune or trouble.

Is there a word Sinisterness?

adjective threatening, evil, menacing, forbidding, dire, ominous, malign, disquieting, malignant, malevolent, baleful, injurious, bodeful There was something sinister about him that she found disturbing.

Is Sinister a feeling?

Meaning of sinister in English. making you feel that something bad or evil might happen: The ruined house had a sinister appearance.