Seavy is a derived term of seave.
In uk dialect terms the difference between seave and seavy
is that seave is a rush (the plant) while seavy is overgrown with rushes.
As a noun seave
is a rush (the plant).
As an adjective seavy is
overgrown with rushes.
seave
English
Noun
(
en noun)
(UK, dialect) A rush (the plant).
- (Halliwell)
Derived terms
* seavy