Adverb
in an erratic unpredictable manner
Source: WordNet‘Truth of it is,' said Commander Haydock, steering rather erratically round a one-way island and narrowly missing collision with a large van, ‘when the beggars are right, one remembers it, and when they're wrong you forget it.' Agatha Christie
If he had his wits about him Bunny would surely keep his mouth shut; but now, with his subconscious mind knocked loose from its perch and flapping in the hollow corridors of his skull as erratically as a bat, there was no way to be sure of anything he might do. Donna Tartt
economic changes are proceeding erratically Source: Internet
After 1966 it very rapidly decreased until it was less than 0.05 magnitude; since then, it has erratically varied near that range. Source: Internet
According to Vernon North Okanagan RCMP, on Tuesday morning, at approximately 11:20 a.m., a patrol officer saw a grey sedan with no licence plates driving erratically in the area of 42nd Avenue and 35A Street. Source: Internet
A woman on a cocktail of drugs who drove erratically for 20km on the region’s busiest road was potentially "a lethal weapon", a judge says. Source: Internet