because; owing to; on account of
因 · 6 strokes
Pictograph of clothing surrounding (囗) a person (大), now written as 裀. The current meaning is a phonetic loan.
为 · 4 strokes
Simplified form of 為. Pictograph of a hand (又) guiding an elephant (象) to do work (in ancient China elephants were tamed to do work). Based on the meaning "to work; to do".