Abandon is one word. You might be thinking of straggler.
Remain.
it can mean remain..or stay.. for example... ellos se quedan atras..means they stay behind.. and quedan solo dos horas...means only two hours remain.
previous , behind , stay ,
behind
If you mean to say 'left behind' as in, "When I moved, my friends, school, and home were left behind" Then you could substitute, 'left behind' with 'remained in the past', and remove the word 'were'.
Don't be left behind.
It can be (a derelict ship, derelict in his duty).The word derelict means left behind, abandoned, or neglected. It can be a noun for a derelict ship.
Things that are left behind.
It is unclear what the question is asking. The Arabic equivalent for the word "left" as in the opposite of "right", is shemaal (شمال). The Arabic equivalent for the word "left" as in "departed" is ghaadara (غادر) or kharaja (خرج). The Arabic equivalent for the word "left" as in "deposited" or "left behind" -- i.e. He left his keys in the house -- is taraka (ترك). If the question is asking what the Arabic word left (لفت) means in English, it means "attraction" or "attracting". It can also be used in some countries to refer to an elevator, although mas3ad (مصعد) is more common.
It is leave
Leave.
All nonessential personnel will have to stay behind the barriers.