bemourn

The story

1. Old English · inherited frombemurnan“to mourn, bewail, deplore, be sorry for, care for, take heed for”
2. Middle English · inherited frombemornen
3. English todaybemourn

From Middle English bemornen, from Old English bemurnan (“to mourn, bewail, deplore, be sorry for, care for, take heed for”), equivalent to be- (“over, about”) + mourn. Cognate with Old Saxon bimornian (“to bemourn”).