Decay

гние́ние

gnijénije

(process or result of being gradually decomposed)

разложе́ние

razložénije

(process or result of being gradually decomposed)

распа́д

raspád

(process or result of being gradually decomposed)

спад

spad

(deterioration of condition)

упа́док

upádok

(deterioration of condition)

по́ртиться

pórtitʹsja

(to deteriorate)

распа́сться

raspástʹsja

(To change by undergoing fission, by emitting radiation, or by capturing or losing one or more electrons.)

распада́ться

raspadátʹsja

(To change by undergoing fission, by emitting radiation, or by capturing or losing one or more electrons.)

ухудша́ться

uxudšátʹsja

(to deteriorate)