This kanji, ¤»¤¤, means "one's nature" or "disposition" and is a combination of two kanji. The left side is a simplified form of ¿´, "heart" or "core", and the right side is À¸, meaning "life". Thus, one could think of this kanji in the terms: A person's nature is the core of their life.
A pictorial alternative would be to see the left side as a person and the right side as a tree. If you imagine the first stroke of À¸ as a machete, you get a person chopping down a tree, illustrating that it is man's inherent nature to oppose the forces of nature (in this case, trees.)
(Contributed by: Alex K of Wesleyan University on 1/30/07)