なるほど の訳語→ actually admittedly ah aha certainly convinced do fine gotcha indeed magnificent probably quite really so sure then true truly uh-huh undoubtedly well yes
びっくりする の訳語→ panic remarkable shocked worried
意外な の訳語→ astonished expect extraordinary obvious odd unexpected
疑う の訳語→ believe distrust doubt guess know sus think wonder
仰天する の訳語→ amaze astonish freak horrify jump terrify
思いがけない の訳語→ abrupt accidental alarming curious disproportionately piece startle strange surprise unbelievable unheralded unsuspected
唐突に の訳語→ abruptly inconsequently soon suddenly
不思議 の訳語→ impressive marvel mysterious puzzle strangeness surprising
驚く の訳語→ appreciation die impress shock shock oneself startled
