記号
きごう · kigou · JLPT N2 · noun
symbol
🔣 記 (write down) + 号 (sign/number) = a written sign that stands for something
記 means to record or write, and 号 means sign or mark. Put together, a 記号 is a mark you write down to represent a meaning, like a symbol or a code.
号 — mouth 口 + tiger 虎
Originally written 號, combining 口 (mouth, indicating a cry or call) with 虎 (tiger) as the phonetic and a hint at a loud roar. It first meant to shout or call out, then extended to a name, title, or signal. The simplified form 号 keeps only the upper element.