oblivious

definition: 
lacking conscious awareness of
sentence: 
Many adolescent children are pretty oblivious about their parents’ birthdays, step- or otherwise.
The students were oblivious to the fact that the test would be accumulative.
difficulty: 
easy
toefl frequency: 
2
toefl classification: 
adverb: 
obliviously
adjective: 
oblivious
adverb sentence: 
It also suggests that too many works on display may mean that people look less, because they move faster and more obliviously.
adjective sentence: 
verb: 
verb sentence: 
noun: 
noun sentence: 
obliviousness