universal, wide(ly), generally, Prussia
普 centers on something that extends everywhere without exception: universal, widespread, or generally applicable. The historical reference to Prussia is a phonetic loan usage, not part of the core meaning.
普 combines 並 (line up, ordinary) with 日 (sun), suggesting the sun's light reaching everything equally and universally.
The sun 日 shines down on everything lined up 並 below it, spreading light universally and widely.
For フ, imagine the sun's universal light as a huge, fluffy blanket covering everything: flu-ffy -> フ, and the warmth reaches all.
normal; ordinary; regular; usual; common; average
usual; normal; everyday; habitual; ordinary
diffusion; spread; popularization; promulgation; familiarization
universal; general; ubiquitous; omnipresent
ordinary bank account
everyday clothes; ordinary clothes; casual wear; informal dress
vault of heaven; whole world
building; construction
completely normal; very ordinary; totally unremarkable; run-of-the-mill
temporary building
dividing work among several contractors
cheap structure (e.g. of houses)
Japanese Calligraphy Promotion Organization
Franco-Prussian War
standard driver's licence
Fuke school (defunct sect of Zen Buddhism)
mass-market product (i.e. non-premium)
public awareness (e.g. publicity and education campaigns aimed at improving the health, environment, etc.)
cheap edition (of a book, etc.); popular edition
diffusion rate; rate of spread