n. 向上的一笔

[ noun ]
a stroke normally made in an upward direction
<noun.communication>

Upstroke \Up"stroke`\, n.
An upward stroke, especially the stroke, or line, made by a
writing instrument when moving upward, or from the body of
the writer, or a line corresponding to the part of a letter
thus made.

Some upstroke of an Alpha and Omega. --Mrs.
Browning.