(bokmål) grunnløs, grunnlaus, ubegrunnet betyr engelsk

groundless▼(baseless)
adjective
[UK: ˈɡraʊnd.lɪs] [US: ˈɡraʊnd.ləs]

unfounded▼(not based on solid reasons or facts)
adjective
[UK: ˌʌn.ˈfaʊn.dɪd] [US: ən.ˈfaʊn.dəd]