allvarlig

Etymology
From, from. .

Adjective

 * 1) serious (not joking, solemn)
 * 2) serious, severe, grave ((potentially causing something) very bad)
 * 1) serious, severe, grave ((potentially causing something) very bad)
 * 1) serious, severe, grave ((potentially causing something) very bad)
 * 1) serious, severe, grave ((potentially causing something) very bad)

Usage notes
Compare.