unmistakable

definition: 
clearly evident to the mind
sentence: 
The unmistakable sound of a knuckle cracking is caused by a gas cavity forming between finger joints, according to a new study.
The markings of the insect provided for an unmistakable identification of the species.
difficulty: 
very easy
toefl frequency: 
2
toefl classification: 
adverb: 
unmistakably
adjective: 
unmistakable
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