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silence; stillness; quietness
「静寂」 has another reading with different meanings.
夜の森に静寂が広がり、虫の声だけが聞こえた。
Silence spread through the forest at night, with only the sound of insects.
しじまを破るように突然の雷鳴が響き渡った。
A sudden clap of thunder echoed, breaking the stillness.
雪が降り積もる冬の朝は、深いしじまに包まれる。
Winter mornings when snow has piled up are enveloped in a deep silence.