FromOld Englishoferflōwan; equivalent toover- +flowen.
overflowen
The simple past of this verb is usuallyweak, but the past participle shows a tendency to be strong (compareflowen, which is usually weak throughout)
1 Later replaced by the 1st-/3rd-person singular oroverflewest.
2 Later replaced by the indicative.
3 Sometimes used as a formal 2nd-person singular.