decay

UK: dɪˈkeɪ | US: dɪˈkeɪ

Definition
  1. n. the process of gradual deterioration or decomposition

  2. vi. to undergo decomposition or decline in quality

  3. vt. to cause something to deteriorate

Structure
de <down, away>cay <fall>
Etymology

decay = de<down, away> + cay<fall>

  • de: A Latin prefix meaning "down" or "away," often indicating reversal or removal.
  • cay: Derived from Latin cadere (to fall), reflecting the idea of decline or collapse.

Etymology Origin:
The word "decay" originates from Old French decair (to decline, perish), which itself comes from Latin de- (down) + cadere (to fall). The concept metaphorically links physical falling (e.g., leaves, structures) to broader decline, such as health or moral integrity. Over time, it generalized to describe any gradual deterioration.

Examples
  1. The abandoned house showed signs of decay, with peeling paint and a crumbling roof.

  2. Sugar can cause tooth decay if oral hygiene is neglected.

  3. Without maintenance, the bridge will decay rapidly due to weather exposure.

  4. The empire’s power began to decay after centuries of expansion.

  5. Organic matter decays faster in warm, humid climates.