moodier
moo-di-er
adjective
More prone to sudden changes in mood, often becoming sullen or irritable.
"He's been moodier since starting his new job."
Thesaurus
Synonyms: emotional, temperamental, moody, Helen Newington Wills, Helen Wills, Helen Wills Moody, glowering, morose, sour, glum, saturnine, dour