| murmur |
| mutter |
| nagging(noun, adjective, gloomy, critical, dissatisfied) |
| out of humor(expression, adjective, idiom, petulant, dissatisfied) |
| plaintive(adjective, difficult, gloomy, critical, sour) |
| protest |
| sniping |
| sour(adjective, difficult, critical, uptight, complaining) |
| squawking |
| sulky(adjective, mean, irritable, annoyed, irritated) |
| testy(noun, adjective, mean, difficult, irritable) |
| unfulfilled(dissatisfied, nit-picking, unassuaged) |
| ungratified(adjective, unhappy, annoyed, irritated, discontented) |
| unhappy(adjective, discontented, resentful, dissatisfied, piqued) |
| acrimonious(adjective, mean, cross, irritable, ugly) |
| annoyed(adjective, unhappy, irritated, discontented, resentful) |
| bad-tempered(adjective, mean, cross, irritable, ugly) |
| bad tempered(expression, adjective, unhappy, annoyed, irritated) |
| bearish(adjective, difficult, critical, sour, discontented) |
| bellyache |