I.
noun
ADJECTIVE
▪ complete , major , massive , thorough
▪ radical
VERB + OVERHAUL
▪ have , undergo
▪
The tax system has undergone a complete ~.
▪ give sth
▪ need , require
II.
verb
ADVERB
▪ drastically , radically
▪
Within a year the party had drastically ~ed its structure.
▪ completely , thoroughly
▪
The plan was completely ~ed.
Overhaul is used with these nouns as the object: ↑ system