be | become | remain | keep sb/sth
The women are kept separate from the men.

consider sth

very, widely
I kept my two lives very separate. | species from widely separate parts of the world

absolutely, completely, entirely, quite, totally, wholly
The waste water is kept entirely separate from the rainwater.

largely | rather, relatively, somewhat | essentially
The two groups are essentially separate and independent.

apparently | hitherto, previously
to merge the two previously separate businesses

geographically, physically

from
a lifestyle which is quite separate from that of her parents

completely, totally | carefully | clearly
These two branches of the science have now become clearly separated.

effectively | easily, readily
One cannot easily separate moral, social and political issues.

formally | legally | physically, spatially | out
A magnet separates out scrap iron from the rubbish.

attempt to, try to | be difficult to, be hard to, be impossible to
It was impossible to separate the rival fans.

from
separating the boys from the girls

into
I separated the documents into two piles.

sharply separated
The disciplines of science and engineering are not always sharply separated.

widely separated
The two groups became widely separated.

legally

decide to

from
She is separated from her husband.