def could be for lots of things, fn is for functions. I don't think it matters much as long as you have one. C would have been so much easier to parse. Just copy Zig or Rust.
fn isnt a legitimate short form of function
fun doesnt work because of the amusement factor
func is the only alternative we have left
These don't have the full fidelity as hn scrubs emojis
add = (a, b) -> a + b
a, b ⟹ a + b
λ add(a, b): ↪ a + b