憂懼 is read as ゆうく (yuuku) and means fear.
ゆうく
yuuku
うれえる
to lament
うきめ
bitter experience
ゆうこく
patriotic concern for the future of one's country
うれい
sorrow
ゆうりょ
anxiety
ゆううつ
depression
うさ
gloom
うきめをみる
to have a hard time of it
うれいごと
ゆうこくがいせい
worrying about the conditions of the country out of sheer patriotism
ゆうせい
worrying about world conditions
ゆうし
grieving