Learn how to say Buckthorn correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word buckthorn:
a shrub or small tree which typically bears thorns and black berries. Some kinds yield dyes and others have been used medicinally.
Genus Rhamnus, family Rhamnaceae: several species, including the common buckthorn (R. cathartica), with berries formerly used as a cathartic.
late 16th century: from buck1 in the sense ‘deer’ + thorn, translating modern Latin spina cervina