eighth principle of the Eight Principles of Yong; rightward falling stroke that fattens at the bottom
Technical term from the 永字八法 (Eight Principles of the Character 永). Refers to the stroke that sweeps rightward and thickens at the end, like the final stroke in 永.
See also: 永字八法
The eighth brush technique of the Eight Principles of Yong is called 'taku'.
「磔」は右に払って、最後に筆を止めて太くする。
For 'taku', you sweep rightward and then stop the brush to make it thicker at the end.
horizontal stroke ending in a triangular tail (clerical script)
crucifix
The character 磔 originally meant 'to tear apart' or 'to execute by dismemberment' in Chinese, but in calligraphy it is used as a technical term for a specific brush stroke. The exact reason for this semantic extension is uncertain.