Mnemonic

You smash a stone open and discover a waste bag crammed inside, oozing a bright yellow stream. The rotten-egg stench hits you instantly—it's pure sulphur, bubbling and hissing from deep within the rock.
Additional thoughts
Picture the vivid yellow stream leaking from the cracked stone, the waste bag acting as a pocket that trapped volcanic sulphur underground. The smell anchors the memory.
Quick recall
Crack a stone, find a waste bag leaking a yellow stream of sulphur.

Details

The keyword for 硫 is sulphur. This kanji refers to the chemical element sulphur (sulfur), a yellow nonmetallic substance found in volcanic regions and hot springs. It has been known since ancient times for its distinctive smell and its use in various chemical and medicinal applications. In Japanese, it commonly appears in compounds related to chemistry and geology, such as sulphuric acid or sulphur dioxide.
On'yomi
りゅう

Used in vocab