selective

definition: 
characterized by very careful or fastidious selection
sentence: 
Scientists were aware that emotional events could enhance past memories, but they didn’t know that the enhancement could be so selective.
Most sound bars use algorithms to create a simulated surround effect, but selective ears will hear a difference.
difficulty: 
very easy
toefl frequency: 
3
toefl classification: 
adverb: 
selectively
adjective: 
selective
adverb sentence: 
adjective sentence: 
verb: 
select
verb sentence: 
noun: 
selectivity
noun sentence: