in mod. usage a n. pl., but in old writers often a f. sing. and spelt hyggjandi, Edda (Gl.), Hm. 6, Skv. 3. 49, Fms. iv. 132, Hðm. 28, Hom., Grág. i. 176:—circumspection, wisdom, svo eru hyggindi sem í hag koma, a saying; at viti ok hyggindi, Fms. v. 342; at hyggindum, Landn. 259; at hyggindi ok réttlæti, Fms. iii. 106; vill hyggjandi (gen. sing.), out of one’s senses, Fas. i. 436 (in a verse); hyggindis-munr, Grett. 147 A.