ずしっと

adverb, noun or participle which takes 'suru'

heavily; profoundly

Onomatopoeic adverb describing a heavy, weighty impact or a profound, deep sensation. Often used with verbs like くる, 響く, or のしかかる. Related to ずっしり, but with a more sudden or impactful nuance.

See also: ずっしり

• その知しらせが心こころにずしっと響ひびいた。

  The news weighed heavily on my heart.