To damage beyond use or repair.
"The storm destroyed the old bridge, leaving it completely unusable."
In plain English: To destroy something means to ruin it so badly that it is broken beyond repair and cannot be used anymore.
"The storm destroyed our small boat, leaving us stranded on the beach."
Usage: Use destroy when an action causes something to be so severely damaged that it cannot be used or repaired again. This word implies total ruin rather than simple harm or temporary setback.
The word "destroy" comes from the Latin verb meaning "to unbuild," formed by combining a prefix for negation with a root that means "to build." It entered English through Middle French, carrying its original sense of tearing something down or ruining it.