Tachi simply means sword , any sword .
Tachi simply is often used to denote an older style of curved sword , usually ( but not always ) longer and with more curve than a katana , mounted for use slung on cords edge down ( calvary style ) .
Tachi simply means sword , any sword , but is often used to denote an older style of curved sword , usually ( but not always ) longer and with more curve than a katana , mounted for use slung on cords edge down ( calvary style ) .