I.out [美 aʊt, 英 aʊt]副out often appears as the second element of certain verb structures in English (come out, keep out, knock out, etc). For translations, see the relevant verb entry (come, keep, knock, etc).
By contrast, in a large indoor shopping mall a retailer would shell out $400,000 just to get started, and a whopping $490,000 if he chose to walk away.