古怪 (gǔ guài)

Character breakdown

• 古 (Gǔ) · 5 strokes

  Depicts a shield. Based on the original meaning "firm, solid", which is now written as 固. The current meaning "old" is a phonetic loan.

• 怪 (guài) · 8 strokes

  Phonosemantic compound. 忄 represents the meaning and 圣 represents the sound.