軽量

1. Origins, structure, and basic meaning

• Structure: 軽量 (けいりょう) is a nominal stem for low weight or the process of reducing weight.
• Basic usage: 軽量の折り畳み傘 attributes low weight to a travel umbrella, while 部品を軽量化する reduces the mass of machine parts.

2. Common pitfalls and similar expressions

• Existing property and weight-reduction process
  • 軽量の傘 is already light, whereas 軽量化する is a change process. Low weight is not necessarily identical to small size or simple construction.