IPA: /rɪˈspɒnsɪv/
KK: /rɪˈspɑnsɪv/
Quick to react or respond to something; able to answer or reply easily.
The teacher was very responsive to the students' questions during the lesson.
Comparative: more responsive
Superlative: most responsive
Responsive → It is formed from "respondere" (meaning to answer) and the suffix "-ive" (meaning having the nature of). The word "responsive" describes having the nature of answering or reacting to something.
Think of someone who is quick to 'answer' ('respondere') — that's why being responsive means reacting promptly.