change - undergo a change; become different in essence; losing one's or its original nature; "She changed completely as she grew older"; "The weather changed last night"

deteriorate - become worse or disintegrate; "His mind deteriorated"

rust, corrode - become destroyed by water, air, or an etching chemical such as an acid; "The metal corroded"; "The pipes rusted"

weather - change under the action or influence of the weather; "A weathered old hut"

eat at, erode, gnaw at, gnaw, wear away - become ground down or deteriorate; "Her confidence eroded"

wilt, droop - become limp; "The flowers wilted"

ruin - fall into ruin

fall apart, wear out, bust, wear, break - go to pieces; "The lawn mower finally broke"; "The gears wore out"; "The old chair finally fell apart completely"