IPA: /ˈdʒɛləsnəs/
KK: /ˈdʒɛləsnəs/
The feeling of wanting what someone else has, often leading to resentment or envy.
Her jealousness made it hard for her to be happy for her friend's success.
Jealousness is formed from "jealous" (from Old French *jaloux*, meaning envious or possessive) and the suffix "-ness" (meaning the state or quality of). The word describes the state of being envious or possessive towards someone or something.
Think of the word 'jealous' which means feeling envious, and remember that 'jealousness' refers to the state of feeling that way.