Saturnine
Part of speech: adjective
Definition: of or born under Saturn's influence containing lead, or suffering from lead poisoning (saturnia) cold and slow to change and reaction (refers to mood) gloomy, depressed, dull sardonic, bitter, disdainful
Moody
Part of speech: adjective
Definition: Given to sudden or frequent changes of mind; temperamentalsulky or depresseddour, gloomy or brooding
Example sentence: Hormones get no respect. We think of them as the elusive chemicals that make us a bit moody, but these magical little molecules do so much more.