Shirabe
恐るべき

恐るおそる

Nidan verb (upper class) with 'ru' ending (archaic) Yodan verb with 'ru' ending (archaic) Nidan verb (lower class) with 'ru' ending (archaic) Intransitive
Español jmdict
1
intransitive verb temer;ser temeroso
English jmdict
1
intransitive verb archaic to fear;to be afraid
See also: 恐れる (おそれる), 恐るべき (おそるべき)
Other forms 畏る 【おそる】 · 怖る 【おそる】 · 懼る 【おそる】
English jmdict
1
noun or verb acting prenominally terrible;terrifying;dreadful;horrible;horrifying;appalling
エイズウイルスの拡散は恐るべき速さで進んでいる。
The speed of the spread of AIDS is horrifyingly fast.
2
noun or verb acting prenominally astonishing;astounding;staggering;tremendous;awesome;enormous
Other forms 畏るべき 【おそるべき】 (rarely used kanji form)