I.
noun
1 sth new and difficult
ADJECTIVE
▪ big , considerable , enormous , great , huge , monumental , radical , real , serious , significant
▪ daunting , difficult , formidable , stiff , tough
▪
The army faced the daunting ~ of fighting a war on two fronts.
▪ fundamental , key , main , major , primary , ultimate
▪ fresh , new , unprecedented
▪ constant , continuing , ongoing
▪ future
▪ exciting , interesting
▪ special , unique
▪ economic , engineering , environmental , intellectual , logistical , physical , political , technical , technological
▪
Getting the instrument built and tested was a major technical ~.
▪ global
VERB + CHALLENGE
▪ be , constitute , remain , represent
▪
The competitive market represents significant ~s for farmers.
▪ create , offer , pose , present , provide , raise
▪ address , confront , face , handle , meet , respond to , rise to , tackle , take on , take up
▪
The gallery has risen to the ~ of exhibiting the works of young artists.
▪
He has taken on some exciting new ~s with this job.
▪ overcome , solve
▪ enjoy , relish , welcome
CHALLENGE + VERB
▪ confront sb , face sb
▪
the ~s facing nurses in casualty
▪ arise , exist , remain
▪
She could always be counted on when a ~ arose.
▪ lie
▪
The ~ lies in creating a demand for the product.
2 call for sb to fight, prove sth, etc.
ADJECTIVE
▪ effective , serious , strong
▪ direct
▪ constitutional , legal
▪ leadership , title
▪
his title ~ to the heavyweight champion
VERB + CHALLENGE
▪ be , constitute , present , represent
▪
The demonstration represents a direct ~ to the new law.
▪ file ( esp. AmE ), issue , mount , raise
▪
plans to mount a leadership ~ within the party
▪ accept , take up
▪
I accepted his ~ to a game of chess.
▪ answer
▪
He was answering ~s to the government's policy.
▪ beat off , fight off
▪
Our team will have to fight off the ~ from better trained teams.
▪ survive , withstand
PREPOSITION
▪ ~ from
▪
a ~ from the other political party
▪ ~ to
▪
a legal ~ to the President's power
II.
verb
1 question whether sth is right/true
ADVERB
▪ directly , openly , publicly
▪
The newspaper was directly challenging the government's legitimacy.
▪ seriously , vigorously
▪ effectively
▪
She was effectively challenging the whole basis on which society was run.
▪ successfully
▪
The story was completely untrue and was successfully ~d in court.
▪ constantly , continually , repeatedly
VERB + CHALLENGE
▪ seek
▪
Harley sought to ~ the jurisdiction of the court.
PREPOSITION
▪ on
▪
She ~d him on his old-fashioned views.
2 invite sb to compete, argue, etc.
ADVERB
▪ seriously
▪
No one has seriously ~d the champion.
▪ successfully , unsuccessfully
PREPOSITION
▪ for
▪
She was poised to ~ for the party leadership.
▪ to
▪
The count ~d him to a duel.
Challenge is used with these nouns as the subject: ↑ case , ↑ movement
Challenge is used with these nouns as the object: ↑ assertion , ↑ assumption , ↑ authority , ↑ belief , ↑ claim , ↑ competence , ↑ conception , ↑ convention , ↑ credibility , ↑ decision , ↑ detention , ↑ dogma , ↑ dominance , ↑ establishment , ↑ finding , ↑ hierarchy , ↑ idea , ↑ ideology , ↑ interpretation , ↑ legality , ↑ limit , ↑ logic , ↑ monopoly , ↑ myth , ↑ norm , ↑ notion , ↑ orthodoxy , ↑ perception , ↑ practice , ↑ preconception , ↑ prejudice , ↑ prerogative , ↑ racism , ↑ regime , ↑ stereotype , ↑ supremacy , ↑ theory , ↑ thesis , ↑ tradition , ↑ validity , ↑ view , ↑ will , ↑ wisdom