sword

Definition:

A sword is a flat-bladed metal weapon used to cut or stab. It has a handle and a long, pointed blade with a very sharp cutting edge.

The blade of a sword in ancient times was around 60 to 91 centimeters long.
Some swords have two sharp edges and are called "double-edged" or "two-edged" swords.
Jesus' disciples had swords they planned to use to defend themselves. With his sword, Peter cut off the ear of the high priest's servant.
Both John the Baptist and the apostle James were beheaded with swords.

A sword is used as a metaphor for God's word. God's teachings in the Bible expose people's innermost thoughts and convict them of their sin. In a similar way, a sword cuts deeply, causing pain. (See: Metaphor)
One way to translate this figurative use would be, "God's word is like a sword, which cuts deeply and exposes sin."
Another figurative use of this term is in the book of Psalms where the tongue or speech of a person is compared to a sword, which can injure people. This could be translated as, "the tongue is like a sword that can badly injure someone."
If swords are not known in your culture, this word could be translated with the name of another long-bladed weapon that is used to cut or stab.
A sword could also be described as a "sharp weapon" or "long knife." Some translations may decide to include a picture of a sword.