i Register
In some senses, ruinate is marked as archaic. Watch for register when choosing this word.
verb
To reduce to ruins; to destroy.
Towres, Cities, Kingdomes ye would ruinate, / In your auengement and dispiteous rage […].
[…] as in lust, [animals] covet carnal copulation at set times, men always, ruinating thereby the health of their bodies.
To fall; to tumble.
adj
Falling into ruin; decrepit.