From English - German Ding/FreeDict dictionary ver. 1.9-fd1:
waul /wˈɔːl/ <v>
[Sc.] heulen, flennen [Mitteldt.] , plärren [Süddt.] [Ös.] , greinen [Mitteldt.] [Schw.] , röhren [Ös.] , brüllen [Schw.] , tränzen <v, intr> [Bayr.] [Ös.] [veraltet] [ugs.]
Note: laut weinen
Synonyms: bawl, howl, squall
see: bawling, howling, squalling, wauling, bawled, howled, squalled, wauled, bawls, howls, squalls, wauls, bawled, howled, squalled, wauled, It's enough to make you weep!, It's enough to make you cry!, I could have cried.
Note: weep noisily