Short pointed weapons with sharp blades, typically used for stabbing, or piercing looks of anger.
From Middle English 'dagger,' possibly from Gaelic 'daigear' or Old Norse 'dagga.' The weapon became prominent in medieval Europe and has been used metaphorically for angry looks since the 16th century.
The phrase 'looks that could kill' or 'throwing daggers with her eyes' shows how a weapon so small and quick became the perfect metaphor for those silent moments of intense anger between people.
Complete word intelligence in one call. Free tier — 50 lookups/day.