由急が (isoga, 急ぐ (isogu, “急忙,匆忙”)的未然形) + ば (ba, “的话”) + 回れ (maware, 回る (mawaru, “转悠”)的命令形)构成的短语。
急(いそ)がば回(まわ)れ • (isogaba maware)