| Sewar | |
|---|---|
 A Sewar, pre-1887. | |
| Type | Dagger |
| Place of origin | Indonesia (Aceh) |
| Service history | |
| Used by | Acehnese, Gayo, Alas, Minangkabau |
| Specifications | |
| Length | 12–29 cm (4.7–11.4 in) |
| Blade type | Single edge, sometimes double edged |
| Hilt type | Wood, horn, ivory, Bahar roots |
| Scabbard/sheath | Wood, horn, ivory |
Sewar (Sejwa, Sivas, Siwah, Siwai, Siwar, or Siwaz) refers to a dagger of Indonesian origin, typically carried in a belt and used mainly in Sumatra, Indonesia. The blade is also referred to as Sewah by the Gayo people, Seiva by the Minangkabau people, Siva by the Alas people, and Siwaih by the Acehnese people.