grunn n (genitive singular grunns, nominative plural grunn)
See the etymology of the corresponding lemma form.
grunn
From Old Norse grunnr (“bottom”), from Proto-Germanic *grunduz (“ground, foundation”), from Pre-Germanic *gʰrm̥tús, from Proto-Indo-European *gʰrem-.
grunn (neuter singular grunt, definite singular and plural grunne, comparative grunnere, indefinite superlative grunnest, definite superlative grunneste)
From Old Norse grund and grunnr, from Old Norse grunnr (“bottom”), from Proto-Germanic *grunduz (“ground, foundation”), from Pre-Germanic *gʰrm̥tús, from Proto-Indo-European *gʰrem-.
grunn m (definite singular grunnen, indefinite plural grunner, definite plural grunnene)
The noun must be considered to be from Old Norse grunnr m (“bottom”), grunn n (“shallows”), and grund f (“land, ground, field”). Some of these, if not all, are derived from Proto-Germanic *grunduz (“ground, foundation”), whence also English ground. The adjective is also found in Old Norse as grunnr.
grunn m (definite singular grunnen, indefinite plural grunnar, definite plural grunnane)
grunn (neuter singular grunt, definite singular and plural grunne, comparative grunnare, indefinite superlative grunnast, definite superlative grunnaste)
grunn m (genitive singular gruinn, no plural)