reinforce

definition: 
Strengthen (an existing feeling, idea, or habit):
sentence: 
She said the educational system reinforces the idea that there is only one right answer, stifling creativity
difficulty: 
easy
toefl frequency: 
2
toefl classification: 
adverb: 
adjective: 
adverb sentence: 
adjective sentence: 
verb: 
verb sentence: