This is the 6606th most frequent Russian word.
ibu
The word "ibu" is not Russian; it appears to be Indonesian, meaning "mother."
'Ибу' here is a proper noun, representing a person's name.
Ибу старается учить русский язык каждый день.
Ibu tries to study the Russian language every day.
'Ибу' again is used as a personal name, demonstrating the usage of proper names in sentences.
Я думаю, что тебе стоит познакомиться с Ибу.
I think you should meet Ibu.
'Ибу' illustrates a subject's role in expressing relationship contexts and qualities.