自粛(じしゅく)

voluntary restraint

厳粛(げんしゅく)

solemn

静粛(せいしゅく)

quiet; silent

粛々(しゅくしゅく)と

quietly; solemnly

粛清(しゅくせい)

purge; elimination

粛正(しゅくせい)

rectification; purge

粛然(しゅくぜん)

solemnly; quietly

粛然(しゅくぜん)と

solemnly; quietly

粛(

彼(かれ)は粛々(しゅくしゅく)と仕事(しごと)を進(すす)めた。

He quietly went about his work.

旅行(りょこう)を自粛(じしゅく)しています。

I am refraining from traveling.