That's still not very helpful to me. You might want to explain it a bit more in the README.

For example, taking this line from the first example:

    this.peek = +(this.a: this.b:)

If I replace this by:

    this.peek = +(this.a: this.b:

(note the dropped closing parenthesis) and leave everything else as is, that will not be a syntax error?

I know that Forth is "loose syntax" in that Forth code is just a sequence of white-space separated words, so your comment and mine are both syntactically valid Forth, but without meaningful semantics. But Forth does not use parenthesized function calls the way Copper does.

I see what you're getting at. Yes, a ) is needed... eventually. I think the key with "loose" is that it's forgiving. You won't encounter many syntax errors in average programming because the syntax has few rules. In that case, "very simple" would be better said than "loose".