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The cold can ruin a skateboard, heat can also ruin a skateboard.
Don't ruin the party.Why did you ruin our date?
When speaking of an ancient location, it is called ruins, not ruin for one site.
you get out in the rain with it, which will ruin it
The noun form is also ruin, as in the building fell into a ruin. When used in a verb form for example, to reduce to ruin or devastate
The past participle of "ruin" is "ruined."