2indexing radical for characters with a dominant downward sweep to the left
Tips
usage
丿 is the 撇 stroke — a left-falling diagonal — promoted to a radical slot. It heads characters like 久, 乃, 乌, and 之 in Kangxi-style dictionaries; you'll mostly see it referenced when learning stroke order.
history
Calligraphy theory groups it among the eight basic strokes (the 永字八法), where it is called 掠.
Radical
SlashKangxi #4
The left-falling stroke radical. A structural index slot for characters whose silhouette is dominated by a long 撇 (久, 乃, 乎, 之). Not a standalone word; appears in modern usage only as a stroke name in writing pedagogy and as a Kangxi lookup header.