The most selfish one letter word..........." I" -- Avoid it. The most satisfying two-letter word........" WE" -- Use it The most poisonous three-letter word......." EGO" -- Kill it. The most used four-letter word........" LOVE" -- Value it. The most pleasing five-letter word......." SMILE" -- Keep it. The fastest spreading six-letter word......" RUMOUR" -- Ignore it. The hardest working seven-letter word....." SUCCESS" -- Achie