buildup

/B IH1 L D AH0 P/
noun
  1. 1

    An accumulation; an increase; a gradual development.

    โ€œSnow buildup on roads makes for hazardous driving.โ€

  2. 2

    The construction of a composite core to repair a damaged tooth.

Antonyms

Source: https://en.wiktionary.org/wiki/buildup