Radical 止

5 strokes

one 一 (1) + stop 止 (29a) = upright 正

The meaning “upright” also extends to include “proper”, “just so”, “correct”, etc.

The unicorn, dozing, heard someone shout “Stop!” and sat bolt upright. / The dwarf had set up jungle tours for unicorn-watching (even though he knew the unicorn had hidden in the jungle to get a bit of peace).

Sometimes this character takes the distorted form seen in 30a.