must

Pronunciation:  US [məst] UK [məst]
  • auxv.Must must must;
  • modv.; (Essential or very important) must be, (likely or logical) must
  • adj.Indispensable, (especially as the sexual drive) fury
  • n.Must do (or read, buy, etc)
  • WebShould;; grape juice
have (to) need ought (to) shall should