Where does “threatfully” come from?

threatfully (English) comes from English threatful, from English threat, from Middle English threte, from Old English þrēat, from Proto-Germanic þrautaz, from Proto-Indo-European trewd- — to push, to thrust.

threatfully (English): In a threatful manner

Definitions

In a threatful manner

Ancestry of “threatfully”, step by step

threatfully traces back through two separate lines of ancestry.

via English threatful

Step	Language	Word	Meaning
1	English	threatful	Threatening
2	English	threat	An expression of intent to injure or punish...
3	Middle English	threte	—
4	Old English	þrēat	crowd, swarm, troop, army, press; pressure,...
5	Proto-Germanic	þrautaz	—
6	Proto-Indo-European	trewd-	to push, to thrust

via English ly

Step	Language	Word	Meaning
1	English	ly	Abbreviation of light-year
2	Vietnamese	ly	Alternative spelling of li

Every word from Proto-Indo-European trewd- →Every word from Proto-Germanic þrautaz →Every word from Old English þrēat →