Board Game Arena

I would like to know what kinds of hints are not allowed in this game. We know that alphabets are not allowed on your picture, but how about some indirect hints on the words mentioned? Like using underscores to hint the number of letters involved(e.g. _＿_＿means 4 letters), split the word into several parts and draw respectively (e.g. cocktail spilt into "cock" and "tail").

I think splitting a word up into separate images is fine - although in the example it might be easier (and safer ) to draw a cocktail.

Dashes to show number of letters doesn’t seem in the spirit of the game though....

i hope that will be no arena in this game, because a lot a cheating is possible, and after that will be complicated to verify all