The spelling of the phrase "hath tantrum" may seem a bit confusing at first glance. However, the pronunciation of the word "hath" is simply the archaic form of "has" and is pronounced /hæθ/. The word "tantrum" is pronounced /ˈtæntrəm/, with stress on the first syllable. Therefore, the correct spelling of the phrase is "hath tantrum," which means "has a fit of anger or frustration." While the spelling may be old-fashioned, the meaning of the phrase is still relevant today.