せなかあわせ

背中合わせ

表記・読み：背中あわせ・背中合せ・せなかあわせ

1. 1

   back-to-back; facing in opposite directions

   名詞
2. 2

   two sides of the same coin; inextricably linked (esp. with something dangerous or undesirable)

   名詞
3. 3

   on bad terms; at odds

   名詞