John stiffly sat next to me.
No, the word 'stiffly' is not a noun at all.The word 'stiffly' is the adverb form of the adjective 'stiff'.The noun form of the adjective stiff is stiffness, a concrete noun, a word for a physical quality.
Primly
In a stiff manner.
wavy
It would translate to mean stiff behavior or manners. You can try saying Use the word decorous just as you would use the word 'proper' "Members of the diplomatic corps are expected to behave in a stiffly decorous manner."
Robots move jerky and stiffly due to lack of proper tissue and muscles.
Puffed up
Butterfly, dragonfly, housefly, horsefly, firefly, briefly, stiffly, outfly, deafly, and aloofly.
Riboflavin
Whatever the local greeting is. A stiffly pre-written formality tends to not be as welcoming as something clearly impromptu.
Girl/Boi itz Firzzy and u guys got smol brain u got that ;-;