verb / noun

decay

dih-KAY/dɪkˈeɪ/

Gradual loss of soundness through breakdown.

The fallen apple shows decay in its collapsed, moldy flesh.

A fallen apple visibly rotting, with collapsed brown flesh, a split in its skin, and a small patch of mold, resting beside a shriveled leaf.
Etymology

The underlying image is “falling off”: a decline in strength, quality, or soundness. This general sense of deterioration later extended to physical decomposition and rotting.

In context

Shakespeare Locked Down1:26
statues and monuments that will be around forever? We all know they'll decay into ruin over time.
Sonnet 125: - "Were't aught to me I bore the canopy," (How to understand William Shakespeare's poem)

More examples

  • Dead leaves decay slowly on the forest floor.
  • Regular brushing helps prevent tooth decay.
  • The wooden steps have decayed after years of neglect.

Forms

decay · decays · decayed · decaying

Similar words

rot
Focuses on organic material becoming soft and breaking down.
decompose
Emphasizes organic matter breaking down into simpler substances.
deteriorate
Covers worsening condition or quality without necessarily involving rotting.