Late 16th century; earliest use found in Abraham Fleming (c1552–1607), author, literary editor, and Church of England clergyman. From un- + pleasurable.
Definition of unpleasurable in US English:
unpleasurable
adjective(ˌ)ʌnˈplɛʒ(ə)rəbl
Not pleasurable; unpleasant, disagreeable.
Origin
Late 16th century; earliest use found in Abraham Fleming (c1552–1607), author, literary editor, and Church of England clergyman. From un- + pleasurable.