language
GMAT TOEIC IELTS TOEFL

TOEFL® Vocabulary Practice

Find out how TOEFL Tutor can help you achieve your target score

definition: 
Relating to or affecting respiration or the organs of respiration
sentence: 
A cough may also be caused by inflammation of the upper respiratory track due to a viral infection due to the common cold or flu.
difficulty: 
easy
toefl frequency: 
2
toefl classification: