1.
serious, earnest, sincere
Describes a serious attitude or approach. Implies genuine effort and concentration.
2.
real sword
Literally refers to a real (not practice) sword. This is the original meaning.
Related Words
Compare:
本気 (serious (intentions))
Compare:
深刻 (serious (grave))
Compare:
真面目 (serious, diligent)
Related:
木刀 (wooden sword)
Related:
ガチンコ (for real)
Compare:
竹刀 (shinai)