subsidence

 
Pronunciation: /səbˈsʌɪd(ə)ns, ˈsʌbsɪd(ə)ns/

noun

[mass noun]
  • the gradual caving in or sinking of an area of land: the race was abandoned because of subsidence of the track [as modifier]: subsidence damage

Origin:

mid 17th century: from Latin subsidentia 'sediment', from the verb subsidere (see subside)