The story
- Middle English · inherited fromweighti
- English todayweighty
From Middle English weighti, weghti, wighti, equivalent to weight + -y. Cognate with Scots weichty, wechty, wichty, Saterland Frisian wichtich, West Frisian wichtich, Dutch wichtig, gewichtig, German wichtig, Danish vigtig, Swedish viktig. Compare typologically Russian ве́ский (véskij), весо́мый (vesómyj) (< вес (ves)). Also compare the same meaning development from cognate (by borrowing) Polish waga (< ... < Proto-Germanic *wēgō): ważny (whence Russian ва́жный (vážnyj)).
Etymology from Wiktionary, CC BY-SA 4.0.