excite to an abnormal condition, of chafe or inflame; "Aspirin irritates my stomach"
excite to some characteristic action or condition, such as motion, contraction, or nervous impulse, by the application of a stimulus; "irritate the glands of a leaf"
a gradual decrease; as of stored charge or current
the process of gradually becoming inferior
the spontaneous disintegration of a radioactive substance along with the emission of ionizing radiation
an inferior state resulting from the process of decaying; "the corpse was in an advanced state of decay"; "the house had fallen into a serious state of decay and disrepair"
fall into decay or ruin; "The unoccupied house started to decay"
undergo decay or decomposition; "The body started to decay and needed to be cremated"