俄にわか (niwaka)

にわか講師こうしなので苦労くろうした

I had a hard time because I was just improvising as a teacher.

後に芸として俄から独立。

Later, this type of arts separated from niwaka arts and was established as an independent type of art.

漁船が入ると港は俄かに活気をおびてくる.

With the arrival of the fishing boats, the port suddenly becomes animated [comes to life].

江戸では、「吉原俄」として有名であった。

In Edo, it was well known as 'yoshiwara-niwaka' (niwaka played in Yoshiwara red-light district).

司馬遼太郎の小説「俄」にも登場している。

He also appeared in the novel "Niwaka" by Ryotaro SHIBA.

そうすると、俄かに二人の娘の病いは快癒する。

That two daughters got over their illness immediately.

にわか仕込じこみの知識ちしきではその問題もんだいは解とけなかった。

Hastily acquired knowledge was not enough to solve the problem.

彼の意識は俄かに、かっと燃え立ち、注意は張りつめた。

His mind suddenly became alive and attentive.

俄（にわか）とは、江戸時代から明治時代にかけて、宴席や路上などで行われた即興の芝居。

Niwaka refers to an impromptu play performed at banquets, on the street, and elsewhere from the Edo period to the Meiji period.

路上で突然始まり、衆目を集めたために、「俄かに始まる」という意味で、俄と呼ばれたとされる。

This comic play is believed to have been named niwaka, which is a word meaning 'sudden' or 'suddenly,' as the performance always began suddenly on the street and attracted people's attention.

その後、俄や、俄から転化し2人で落語を演じる形式の軽口、浪曲の要素が混ざり合って今の形式になった。

After that, manzai began including elements of Niwaka (an impromptu comic play), Karukuchi, which was transformed from Niwaka and had a form of rakugo played by two persons, as well as Rokyoku (recitation of a kind of sung narrative), and reached its present form.