dagger
dag‧ger /ˈdæɡə $ -ər/
noun [countable]
1. a short pointed knife used as a weapon
2. look daggers at somebody informal to look at someone angrily
3. be at daggers drawn if two people are at daggers drawn, they are extremely angry with each other
⇨ cloak-and-dagger
dag‧ger /ˈdæɡə $ -ər/
noun [countable] Date: 1300-1400
Origin: Perhaps from dag 'to push a knife into' (14-18 centuries)
Origin: Perhaps from dag 'to push a knife into' (14-18 centuries)

1. a short pointed knife used as a weapon
2. look daggers at somebody informal to look at someone angrily
3. be at daggers drawn if two people are at daggers drawn, they are extremely angry with each other
⇨ cloak-and-dagger