Constrain vs Restains - What's the difference?

As verbs the difference between constrain and restains

is that constrain is to force physically, by strong persuasion or pressurizing; to compel; to oblige while restains is (restain).

(en verb)

To force physically, by strong persuasion or pressurizing; to compel; to oblige.

To keep within close bounds; to confine.

To reduce a result in response to limited resources.

* (l)

* English control verbs

(head)

(restain)

(en verb)

to stain again