KanjiJLPT N1
Solemn

solemn, quietly, softly

Mnemonic

A brush lies perfectly aligned on a table beside an untouched bowl of rice. No one dares eat or speak — this is a solemn purification rite. Each calligraphy stroke must be flawless before the rice may be touched. The brush waits. The table is silent. Discipline reigns.
Additional thoughts
Picture a dimly lit temple room: a single brush centered on a bare table, a cold bowl of rice beside it. The atmosphere is heavy with reverence — eating is forbidden until the sacred writing is complete. The stillness itself enforces order.
Quick recall
A brush on a table beside cold rice — untouched until the solemn rite is complete.

Details

The keyword for 粛 is solemn. This kanji conveys a sense of gravity, seriousness, and reverent dignity, often associated with formal ceremonies, disciplined conduct, or an atmosphere of deep respect. It carries the nuance of being quiet and composed in a way that commands awe, as well as the idea of purification or putting things in strict order. It is frequently used in contexts involving discipline, reverence, or the elimination of disorder.
On'yomi
しゅく、すく
Kun'yomi
つつし.む