As verbs the difference between derain and detain
is that derain is obsolete spelling of lang=en while detain is keep (someone) from proceeding by holding them back or making claims on their attention.
detain
English
Verb
(
en verb)
Keep (someone) from proceeding by holding them back or making claims on their attention.
To put under custody.
To keep back or from; to withhold.
* Jeremy Taylor
- Detain not the wages of the hireling.