Question

اصطفّ \ اصطفاف

Accepted Answer

to line up, take position in a row or line, stand in a row or line, be lined up, be aligned, be strung on a line; fall in, stand in formation (military)

Front	اصطفّ \ اصطفاف
Back	to line up, take position in a row or line, stand in a row or line, be lined up, be aligned, be strung on a line; fall in, stand in formation (military)

Row Line Stand اصطفّ اصطفاف Position Lined Aligned