adverb
Only with reading ふつうに
Standard adverbial use meaning 'in the usual way' or 'under normal circumstances'. Used with the reading ふつうに.
See also: 普通
普通に考えれば、それは無理だ。
If you think about it normally, that's impossible.
adverb
by normal standards; actually; genuinely
Colloquial use when giving a positive assessment, often implying something exceeds expectations. Used with any reading.
このラーメン、普通にうまい。
This ramen is actually really good.
adverb
without any issues; surprisingly well; just fine
Colloquial use describing an action that goes smoothly or better than expected. Used with any reading.
初めてなのに、普通にできた。
Even though it was my first time, I managed just fine.
普通 is the base noun/adjective meaning 'normal' or 'ordinary'. 普通に is its adverbial form, but has developed colloquial senses beyond simple adverbial use.
Adverbial form of 普通 (normal, ordinary), formed by adding に to the noun/adjectival noun. The colloquial senses likely developed from the idea of something being 'normally' good or doable, implying it meets or exceeds ordinary standards.