1. retreat, falling back, moving backwards, reversing, backing up (of a vehicle), retrogression, retraction

noun or participle which takes the aux. verb suru noun (common) (futsuumeishi) intransitive verb

2. recession, waning

intransitive verb noun or participle which takes the aux. verb suru noun (common) (futsuumeishi)

3. backspace (key)

noun (common) (futsuumeishi) computing