We don't think it's serious.
CC-BY 2.0 (France) Attribution: tatoeba.org #4890423 (CK) & #5911771 (verdastelo9604) · Tatoeba source · CC BY 2.0 FR
Traditional: 肅
sù
Definitions: CC-CEDICT contributors · CC BY-SA 4.0 · snapshot 2026-10-09. Display: consolidated readings, linked characters and marked pinyin. Original data
Unihan 17.0.0 · Unicode License V3. Make Me a Hanzi · LGPL 3+. Interactive stroke order is available in the study tools.
We don't think it's serious.
CC-BY 2.0 (France) Attribution: tatoeba.org #4890423 (CK) & #5911771 (verdastelo9604) · Tatoeba source · CC BY 2.0 FR
Take things a little more seriously.
CC-BY 2.0 (France) Attribution: tatoeba.org #31235 (CK) & #797046 (Martha) · Tatoeba source · CC BY 2.0 FR