1.
thickness
The distance between two opposite surfaces of something.
厚さ is a measurement noun derived from the adjective 厚い (thick) + the nominalizing suffix さ. It expresses thickness as a measurable quantity.
COMMON PATTERNS:
HOMOPHONE:
Do not confuse with 暑さ (heat/hotness from weather), which has the same reading but different kanji and meaning.
RELATED MEASUREMENT NOUNS:
- 長さ: length (from 長い)
- 高さ: height (from 高い)
- 深さ: depth (from 深い)
- 広さ: area/spaciousness (from 広い)
- 重さ: weight (from 重い)
All follow the same い-adjective stem + さ pattern to create nouns expressing degree or measurement.