'Art' in the Bible

Be not over-righteous, nor show thyself too wise, why art thou desolate?

See life with the wife whom thou hast loved, all the days of the life of thy vanity, that He hath given to thee under the sun, all the days of thy vanity, for it is thy portion in life, even of thy labour that thou art labouring at under the sun.

All that thy hand findeth to do, with thy power do, for there is no work, and device, and knowledge, and wisdom in Sheol whither thou art going.

Happy art thou, O land, When thy king is a son of freemen, And thy princes do eat in due season, For might, and not for drunkenness.