Meaning of 目/meaning-of-急 in Japanese

事態は急を要するので一刻も待てないと彼は言った。
He said that the matter was urgent, and that there was not a moment to lose.

屋根にいく階段は狭くて急でくらいです。
The staircase leading to the rooftop is narrow, steep, and dark.

この川の流れは急だ。
The current of this river is rapid.

この川はあの川の３倍長い。
This river is three times longer than that one.

信濃川と阿賀野川ではどちらが長いですか。
Which is longer, the Shinano River or the Agano River?

「そのとおり」私は、シャワーを浴びている時に石鹸が目に入るとヒステリー状態になる男のように、娘のこの話に身震いしながら言った。
Right, I said, shivering at this recital as a man would who gets hysterical while taking a shower if a bit of soap stings his eye.

ヘレン・ケラーは目と耳と口が不自由だった。
Helen Keller was blind, deaf and dumb.

彼は崇拝の眼で彼女を眺めた。
He regarded her with worship in his eyes.