Word Study
rest-harrow
CIDE DICTIONARY
rest-harrow, n.
A European leguminous plant (Ononis arvensis ) with long, tough roots. [1913 Webster]
OXFORD DICTIONARY
rest-harrow, n. any tough-rooted plant of the genus Ononis, native to Europe and the Mediterranean.
Etymology
obs. rest (v.) = ARREST (in sense 'stop') + HARROW
For further exploring for "rest-harrow" in Webster Dictionary Online