What's wrong with "else"

Python already has this.

die unless $keyword == "unless";

i assume "ifnot" wasn't edgy enough and makes inferior noises on custom mechanical keyboards? /s

I shan't!

array.whomst(element => element === needle)

This is the !biggest comp sci innovation in !decades

I can actually define this in TCL:

% proc ifn't {cond cmds} {if {!$cond} {uplevel $cmds}}
% ifn't false {puts 12}
12
% ifn't true {puts 12}
%