後退(こうたい)retreat, falling back, moving backwards, reversing, backing up (of a vehicle), retrogression, retractionnoun
徐行(じょこう)going slowly (esp. to enable a vehicle to stop immediately), going at a reduced speed, slowing down, reducing speednoun
従事(じゅうじ)engaging in (work), pursuing (e.g. studies), following (a profession), being involved insuru verb