(おそ)ろしい

おそろしい
i-adjective
frightening, terrible
Conjugation
AffirmativeNegative
Present(おそ)ろしい(おそ)ろしくない
Past(おそ)ろしかった(おそ)ろしくなかった
て form(おそ)ろしくて(おそ)ろしくなくて
Adverbial(おそ)ろしく
Conditional ば(おそ)ろしければ(おそ)ろしくなければ
Conditional たら(おそ)ろしかったら(おそ)ろしくなかったら
1. frightening, terrifying
Causing fear.
(おそ)ろしい(ゆめ)()
I had a frightening dream.
(おそ)ろしい(かお)している。
He has a frightening face.
Walking alone on a dark road at night is frightening.
2. terrible, awful
Extremely bad or serious.
(おそ)ろしい事故(じこ)だった。
It was a terrible accident.
(おそ)ろしい被害(ひがい)()
There was terrible damage.
I learned the terrible power of a typhoon.
3. amazing, incredible
Extraordinary (colloquial intensifier).
(おそ)ろしいスピード(はし)
To run at an incredible speed.
(おそ)ろしく(たか)
It's incredibly expensive.
She has an incredible memory.

(おそ)ろしい is an i-adjective meaning frightening or terrible, stronger than (こわ)い.

FORMS:

  • Adverbial: (おそ)ろしく
  • Noun form: (おそ)ろしさ (terribleness)

INTENSIFIER USE:

(おそ)ろしく + adjective/adverb means 'terribly, incredibly':

  • (おそ)ろしく(はや)い: terribly fast
  • (おそ)ろしく(たか)い: incredibly expensive

SIMILAR WORDS:

  • (こわ)い: scary, afraid (more common in daily speech)
  • 恐怖(きょうふ): fear, terror (noun)
  • (もの)(すご)い: tremendous, incredible

NOTE:
In colloquial use, (おそ)ろしい can express amazement at something extreme, not necessarily fear.