丁
dīng · HSK 7
surname Ding
🔨 Looks like a nail — and DING is the sound a hammer makes hitting one
The character 丁 resembles a nail or T-shape. The sound 'ding' echoes the metallic clang of striking a nail. As the 4th Heavenly Stem, think of it as the 4th peg hammered into a board.
丁 — single stroke pictograph, originally a nail
丁 is a pictograph of a nail viewed from above or the side, showing the head and shaft. Its original meaning was 'nail,' later extended to 'sturdy adult male,' then to general senses like 'individual person' or 'fourth' in ordinal lists. The 'nail' meaning is now written 釘.