subsidence
noun
[ səbˈsʌɪd(ə)ns ]
• the gradual caving in or sinking of an area of land.
• "the race was abandoned because of subsidence of the track"
Similar:
collapse,
caving in,
falling in,
giving way,
sinking,
settling,
Origin:
mid 17th century: from Latin subsidentia ‘sediment’, from the verb subsidere (see subside).
