super-heavy

/S UW1 P ER0 EH0 V IY0/
adjective
  1. 1

    Having far greater weight than usual.

    โ€œThe superheavy tank weighed 80 tonnes and was said to be indestructible in combat.โ€

  2. 2

    Describing a transuranic element having an atomic number greater than 110

  3. 3

    (of a syllable) stressed more than is usual

Source: https://en.wiktionary.org/wiki/super-heavy, https://en.wiktionary.org/wiki/superheavy