sword · noun C /sɔːrd/
sword
B2 a weapon with a long sharp metal blade and a handle, used especially in the past
Dictionary example:
He rode toward me, waving his sword in the air.
Learner example:
I took the ancient sword in my hands and felt the power flow through my veins. (First Certificate in English; B2; French)
a double-edged sword
C2 something that has both a positive and a negative effect
Dictionary example:
Being that intelligent is a double-edged sword - he finds it difficult to talk to ordinary people.
Learner example:
As you might see, technological advancements are a double-edged sword. (Certificate of Proficiency in English; C2; Swedish)