quälen

Etymology
From, from , from , from. The vowel was lengthened in modern German under the influence of the related noun. Cognates include 🇨🇬, 🇨🇬, 🇨🇬, and further 🇨🇬, 🇨🇬.

Verb

 * 1)  to torture, to torment, to agonize
 * 2)  to cause sorrow, to upset, to worry
 * 3)  to harass, to bother
 * 4)  to toil, to struggle