Meaning of plagueful in English:
plagueful
Pronunciation /ˈpleɪɡf(ʊ)l/
adjective
Conveying or threatening plague or disease; pestilent. Also in weakened use: annoying, troublesome.
Origin
Late 16th century; earliest use found in Richard Carew (1555–1620), antiquary and poet. From plague + -ful.