grouchy 
/ˈgraʊtʃi/ adjective
grouch·i·er; grouch·i·est /ˈgraʊtʃi/ adjective somewhat informal : tending to complain about things : having a bad temper
▪ a grouchy old man ▪ I get grouchy when I'm tired.
▪ a grouchy old man ▪ I get grouchy when I'm tired.
— grouch·i·ly /ˈgraʊtʃəli/ adverb
/ˈgraʊtʃəli/ adverb— grouch·i·ness /ˈgraʊtʃinəs/ noun [noncount]
/ˈgraʊtʃinəs/ noun [noncount]
