shalt

/ʃælt/
verb
  1. Archaic second person singular form of 'shall', used with 'thou' to mean 'will' or 'must'.
    • In the old poem, the knight says, 'Thou shalt go with me.'
    • Thou shalt not steal is a well-known commandment.
    • The ancient text reads, 'Thou shalt love thy neighbor as thyself.'