もろい

金属きんぞくは低温ていおんになると脆もろくなることがあります。

Metals can become brittle at low temperatures.

Tatoeba · CC BY 2.0 FR · Source

土どとほとんど同おなじくらいの硬かたさしかないため加工かこうは容易よういだが、もろくて崩くずれやすい。

They are easy to process as they are as soft as soil although they are fragile and easily susceptible to collapse.

KFTT corpus (NICT), Wikipedia · CC BY-SA 3.0 · Source

つなぎ粉こを一切使いっさいつかわない生地きじで脆もろく畳たたむのが難むずかしいため、まず生地きじを薄うすく伸のばす。

With no binding agents being used, the dough of Tachi soba is very easy to break making it difficult to fold and, as a result, the dough was rolled out into thin pieces.

KFTT corpus (NICT), Wikipedia · CC BY-SA 3.0 · Source