From Middle English bigronen, equivalent to be- (“at, about”) + groan.
begroan (third-person singular simple present begroans, present participle begroaning, simple past and past participle begroaned)
- (transitive) To groan about; bewail; groan at.
1902, Robert Browning, The poetical works of Robert Browning:
- For these deeds' sake do I begroan thy fate.
1914, James Calvin Hooper, Portinia:
- And, why dost thou oft begroan in sorrow Then other times, bid wisdom good morrow?