IPA: //ˈweɪl.fəl//
KK: /ˈweɪl.fəl/
Describing something that sounds like a cry of sorrow or pain, often expressing deep sadness or grief.
The wailful cries of the lost child echoed through the empty streets.
Wailful → It is formed from "wail" (from Old English *wæilan*, meaning to lament or cry out) and "-ful" (meaning full of). The word "wailful" means full of wailing or expressing sorrow.
Think of someone who is 'full of' ('-ful') 'lamenting' or 'crying out' ('wail') — that's why wailful describes someone expressing deep sorrow.