cup

1. Origins, structure, and basic meaning

• Structure: 杯 has 8 strokes and refers to a drinking cup or the quantity it holds.
• Basic usage: 杯, a drinking cup, is read さかずき, while 一杯 is read いっぱい.

2. Common pitfalls and similar expressions

• One cup and a full state
  • お茶を一杯 expresses the quantity one cup of tea. いっぱい contains a small っ.
  • 人で一杯になり means becoming full of people. Here, 一杯 expresses fullness rather than a quantity of one cup.