Watch out

Fine

I'd say: "watch your fingers" or "mind your fingers."

Thank you, teechr.

Yes, one would say that often, but what would be so different between sayings, "watch your fingers" and "watch out for your fingers"
I don't see why "out and for" has such significance to shift which objects one's intentions are on.

You say "watch the cars" and "watch out for the cars".
"watch out for your sister" to mean look out for her that is if y

onizo Yes, one would say that often, but what is the difference would be so different between sayings, "watch your fingers" and "watch out for your fingers?"

To me "watch out for sb/sth" = be on guard in case you get hurt by someone or something, in this context.

You might say, as it seems to me, this is pointless to talk about, but for the first definition of watching somone not to get hurt by them sounds like it would fit better with "watch out someone", which you don't have a usage.