although; even though (often used correlatively with 可是[ke3 shi4] or 但
虽 · 9 strokes
Simplified form of 雖. Phonosemantic compound. 虫 represents the meaning and 唯 represents the sound. Based on the original meaning "type of lizard". The current meaning is a phonetic loan.
然 · 12 strokes
Phonosemantic compound. 灬 represents the meaning and 肰 represents the sound. Based on the original meaning "burn", now written as 燃. The current meaning is a phonetic loan.