Verb (5-dan, む, intransitive)
1. to draw back; to sink; to cave in
あまりの衝撃に涙はすっかり引っ込んでしまった。The shock was so great that my tears dried up completely.
2. to be set back (e.g. from a road)
3. to withdraw (e.g. from the public eye); to retire to (somewhere); to stay indoors; to butt out; to stay out of it
この曲が終わったら、私は裏に引っ込むつもりでいた。I had intended to withdraw to the back once this song ended.