WHMIS symbols
Each WHMIS pictogram identifies one hazard class by its picture alone, no label text required.
A worked example
A container shows a black flame on a white diamond inside a red border, with no other markings. That picture alone means the contents are flammable, whatever the product name printed under it says.
The mistake people actually make
Say "WHMIS", never "WHMIS 2015": WHMIS is the current standard's own name, not the retired one.