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さぞかし (sazokashi) Japanese meaning: surely | Kotomora
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You must have been very surprised.
Usage patterns さぞかし 〈 形けい 容よう 詞し 〉 だろう must be very [adjective]
After such a long trip, he must be exhausted.
さぞかし 〈 事こと 〉 でしょう it must surely be [situation/feeling] (polite conjecture)
You must be so happy about your child's success.
さぞかし 〈 形けい 容よう 詞し 〉 に 違ちが いない there's no doubt it must be [adjective]
In this cold, it must be really tough for them.
Related words さぞ is the shorter, slightly less emphatic form of さぞかし, both expressing confident conjecture.
さぞや is an old-fashioned, literary-sounding variant of さぞかし with the same emphatic meaning.
きっと is a plain, everyday word for 'surely' used for predictions in general, while さぞかし adds an empathetic, imaginative tone about someone's feelings or situation.
Written forms さぞかし Usage 98%
Standard kana spelling; the kanji form 嘸かし is rarely used.
嘸さぞ かし Usage 2%
rarely-used kanji form
Rarely used kanji form; learners should use the kana spelling.
Etymology Derived from さぞ (emphatic adverb) + かし (old sentence-ending particle expressing exclamation or conjecture). The exact historical development is uncertain.