振(ふ)り返(かえ)るto turn head, to look over one's shoulder, to turn around, to look back, to think back (on), to reminisce, to look back (on), to reflect (on)

背後(はいご)で物音(ものおと)がしたので振(ふ)り返(かえ)りました。

I heard a noise behind me, so I turned around. {to turn head, to look over one's shoulder, to turn around, to look back, to think back (on), to reminisce, to look back (on), to reflect (on)}

もう年末(ねんまつ)だからこの一(いち)年(ねん)を振(ふ)り返(かえ)ってみよう！

Since it's already the end of the year, let's reflect on this past year! {to turn head, to look over one's shoulder, to turn around, to look back, to think back (on), to reminisce, to look back (on), to reflect (on)}

学生(がくせい)時代(じだい)を振(ふ)り返(かえ)り、過去(かこ)の自分(じぶん)の努力(どりょく)に感謝(かんしゃ)しました。

Reflecting on my student days, I expressed gratitude for the efforts I made in the past. {to turn head, to look over one's shoulder, to turn around, to look back, to think back (on), to reminisce, to look back (on), to reflect (on)}

後(うし)ろの方(ほう)で叫(さけ)び声(ごえ)が聞(き)こえたので急(いそ)いで後(うし)ろを振(ふ)り返(かえ)りました。

I heard a scream from behind, so I quickly turned around. {to turn head, to look over one's shoulder, to turn around, to look back, to think back (on), to reminisce, to look back (on), to reflect (on)}

誰(だれ)かに呼(よ)ばれた気(き)がして振(ふ)り返(かえ)ったものの、後(うし)ろには誰(だれ)もいなかった。

I felt like someone called me and turned around, but there was no one behind me. {to turn head, to look over one's shoulder, to turn around, to look back, to think back (on), to reminisce, to look back (on), to reflect (on)}