Opposite of jealous is compassion and nonpossesiveness.
Envy and jealousy are united. Envy is unconscious. Jealousy is blatantly conscious.
Frank John Ninivaggi, MD, of Yale has recently published a great book to clarify these emotions.
For the adjective jealous, the comparative forms are 'more jealous' and 'most jealous'.
The comparative would be more jealous and the superlative would be most jealous.
selfless
jealousy
Jealous
fresh
sober
Pony!
A bull.
Smooth.
Gorging
3
rare
infrequently
Natural
It is irregular
Dim.