to gamble
赌 · 12 strokes
Phonosemantic compound. 贝 represents the meaning and 者 represents the sound. Simplified form of 賭.
博 · 12 strokes
Phonosemantic compound. 盾 represents the meaning and 尃 represents the sound. Based on the original meaning "fight", which later shifted to "win", "plentiful", and "gamble".