What is the meaning of Bu-?

Obsolete class 14 noun prefix.

Class XIV noun prefix

it; class 14 subject concord.

it; class 14 object concord.

to die

Class 14 noun prefix.

it; class 14 subject concord.

it; class 14 object concord.

Used expressively to associate a person with some object, activity or trait: the one with, the one that is

it; class 14 subject concord.

it; class 14 object concord.

Class 14 noun prefix.

it; class 14 subject concord.

it; class 14 object concord.

class 14 pronominal concord

it, they; class 14 subject concord

positive imperative form of -bu- (“it, them; class 14 object concord”)

Rōmaji transcription of ぶ

class 14 noun prefix

class 14 subject concord

it; class 14 subject concord.

it; class 14 object concord.

Class 14 simple noun prefix.

it; class 14 subject concord.

it; class 14 object concord.

Source: wiktionary.org