This is the 526th most frequent Japanese word.
ろ
The Japanese word "ろ" is the hiragana character for the syllable "ro."
This is an imperative form of the verb, where 'ろ' is used to command someone to act.
早く起きろ。
Wake up quickly.
Here, 'でしょう' contains 'ろ', and it is used to express conjecture or seeking agreement.
あの子は歌がうまいでしょう。
That child is good at singing, right?
In this sentence, '行こう' contains 'ろ' and is used to make a suggestion or invitation.