To the best of my knowledge, is 'happiness' and is 'luck' (good or bad). English confuses the matter by using the words for 'luck' and 'fortune' with both neutral and good meanings, but the kanji's meanings are quite separate from each other. has very little to do with luck, actually, and pretty much just means 'happiness' (c.f. 'happy, happiness'). more primarily means 'movement' (c.f. 'motion, movement, exercise', 'drive (a car)', etc), and the 'luck, fortune' meaning is secondary.