(intransitive, now UK dialectal) To pass by, pass away; often, to go unnoticed. [from 9th c.]
Origin of overgo
From Middle English overgon, from Old English ofergān (“to pass over, beyond, across, traverse, cross, transgress, overstep, overrun, overcome, overspread, conquer, come upon, overtake, seize, attack, pass off, pass away, end, overreach”), corresponding to over- + go. Cognate with Dutch overgaan, German übergehen, Swedish övergå.