憂う
Meanings
nidan verb (upper class) with 'hu/fu' ending (archaic)
Archaic upper bigrade verb (ハ行上二段活用). In modern Japanese, this meaning is expressed by 憂える (うれえる) or 心配する. The form 憂う is mainly encountered in classical texts or fixed expressions like 憂うべき.
See also: 憂うべき (うれうべき)
In classical literature, it was used as in 'to worry about the world'.
The old form remains in the expression 'a situation that should be worried about'.
nidan verb (lower class) with 'hu/fu' ending (archaic)
grieve; lament; be anxious; be distressed
Archaic lower bigrade verb (ハ行下二段活用). This form is the classical equivalent of modern 憂える (うれえる) in its transitive sense of grieving or lamenting something. Found in classical poetry and prose.
See also: 憂える (うれえる)
憂ふ was also used to mean grieving or lamenting.
I worry about the future of the country.