for·do also fore·do (fôr-dōō', fōr-) tr.v.
for·did also fore·did (-dĭd'), for·done also fore·done (-dŭn'), for·do·ing also fore·do·ing, for·does also fore·does (-dŭz') Archaic
To bring to ruin; destroy.
To exhaust utterly.
[Middle English fordon, from Old English fordōn : for-, for- + dōn, to do; see dhē- in Indo-European roots.]