[zubat]

Or in other descriptive terms, Forth could be called "point-free" or "tacit". There is no structure given by the code's context, no named arguments to describe what is in scope - all you have is what is on the stack at the moment of execution, and global variables that the program might access by convention.

Point-free can be a very concise and flexible strategy but also error-prone since (in Forth) it allows the stack to leak and consume/return an unbalanced quantity of arguments. This class of error is eliminated within the syntax of Algol style languages languages but can be reproduced easily if you build your own stack machine.